Best 1.20 Swamp Seeds

Start next to a swamp. Each seed includes coordinates and a map.

Java Edition 1.20 · 50 seeds checked against category criteria

These seeds use Java 1.20 (Trails & Tales) generation. Browse all 1.20 categories →

All 50 seeds for Java 1.20

Also has nearby
Predicted biome map of Java 1.20 seed 5514293015203238546 around estimated spawn Explore this seed
#1

5514293015203238546

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 40 (Swamp)
Stronghold
2,249 blocks
  • Swamp0
  • Ruined Portal243
  • Ocean Monument320
  • Village482

Nearby biomes: Swamp · Ocean · Taiga · Forest · Beach

Open in Seed Map →
Predicted biome map of Java 1.20 seed 7118026618020858157 around estimated spawn Explore this seed
#2

7118026618020858157

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
140, -128 (Swamp)
Stronghold
1,637 blocks
  • Swamp0
  • Ruined Portal164
  • Pillager Outpost177
  • Ocean Monument337

Nearby biomes: Deep Cold Ocean · Cold Ocean · Ocean · Forest · Plains · Old Growth Birch Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed -1871853354476395704 around estimated spawn Explore this seed
#3

-1871853354476395704

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
124, 56 (Swamp)
Stronghold
2,148 blocks
  • Swamp0
  • Ruined Portal42
  • Village410
  • Ocean Monument421

Nearby biomes: Cold Ocean · Forest · Taiga · Deep Cold Ocean · Beach · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed 4551061262500573618 around estimated spawn Explore this seed
#4

4551061262500573618

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
32, -64 (Swamp)
Stronghold
2,291 blocks
  • Swamp0
  • Ruined Portal177
  • Village385

Nearby biomes: Swamp · Plains · Snowy Plains · Forest · Windswept Gravelly Hills · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed -2459993280765503659 around estimated spawn Explore this seed
#5

-2459993280765503659

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
28, 28 (Swamp)
Stronghold
2,164 blocks
  • Swamp0
  • Ruined Portal188
  • Village408

Nearby biomes: Swamp · Plains · Ocean · Cold Ocean · River · Windswept Gravelly Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed 1086583675730819051 around estimated spawn Explore this seed
#6

1086583675730819051

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
24, 32 (Swamp)
Stronghold
1,646 blocks
  • Swamp0
  • Ruined Portal287
  • Woodland Mansion709

Nearby biomes: Swamp · Ocean · Windswept Savanna · Mangrove Swamp · Plains · Windswept Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed 5384522091269291686 around estimated spawn Explore this seed
#7

5384522091269291686

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 84 (Birch Forest)
Stronghold
2,650 blocks
  • Swamp0
  • Village262
  • Ruined Portal276

Nearby biomes: Swamp · Plains · Dark Forest · Birch Forest · Forest · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed 9199918719464285680 around estimated spawn Explore this seed
#8

9199918719464285680

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
4, 0 (Swamp)
Stronghold
2,095 blocks
  • Swamp0
  • Ruined Portal368
  • Ocean Monument374

Nearby biomes: Cold Ocean · Swamp · Forest · Plains · Deep Frozen Ocean · Frozen Ocean

Open in Seed Map →
Predicted biome map of Java 1.20 seed 4773115528280724332 around estimated spawn Explore this seed
#9

4773115528280724332

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
48, 32 (Forest)
Stronghold
2,198 blocks
  • Swamp0
  • Village352
  • Ruined Portal366

Nearby biomes: Forest · Plains · Savanna · River · Swamp · Windswept Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed 7064146791687681858 around estimated spawn Explore this seed
#10

7064146791687681858

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
92, 40 (Swamp)
Stronghold
1,646 blocks
  • Swamp0
  • Ruined Portal359
  • Village436

Nearby biomes: Swamp · Snowy Plains · Plains · Taiga · Forest · Snowy Taiga

Open in Seed Map →
Predicted biome map of Java 1.20 seed -2395551526540848290 around estimated spawn Explore this seed
#11

-2395551526540848290

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-64, -48 (Swamp)
Stronghold
1,340 blocks
  • Swamp0
  • Ruined Portal283
  • Village453

Nearby biomes: Swamp · Cold Ocean · Deep Cold Ocean · Plains · Snowy Plains · Beach

Open in Seed Map →
Predicted biome map of Java 1.20 seed 3715369349705299849 around estimated spawn Explore this seed
#12

3715369349705299849

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-8, -56 (Swamp)
Stronghold
1,974 blocks
  • Swamp0
  • Ruined Portal404
  • Woodland Mansion668

Nearby biomes: Ocean · Swamp · Beach · Lukewarm Ocean · River · Deep Ocean

Open in Seed Map →
Predicted biome map of Java 1.20 seed 2695055346517532759 around estimated spawn Explore this seed
#13

2695055346517532759

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-16, -16 (Swamp)
Stronghold
2,056 blocks
  • Swamp0
  • Ruined Portal91
  • Village443

Nearby biomes: Swamp · Forest · Savanna · Plains · Mangrove Swamp · Dripstone Caves

Open in Seed Map →
Predicted biome map of Java 1.20 seed -2814722605696956401 around estimated spawn Explore this seed
#14

-2814722605696956401

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
28, -100 (Swamp)
Stronghold
1,524 blocks
  • Swamp0
  • Ruined Portal185
  • Village244

Nearby biomes: Ocean · Swamp · Mangrove Swamp · Plains · Beach · Lukewarm Ocean

Open in Seed Map →
Predicted biome map of Java 1.20 seed 2378231919508007875 around estimated spawn Explore this seed
#15

2378231919508007875

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-200, 128 (Swamp)
Stronghold
2,096 blocks
  • Swamp0
  • Ruined Portal180
  • Ocean Monument440

Nearby biomes: Cold Ocean · Swamp · Ocean · Beach · Deep Cold Ocean · Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed 3513467580467267742 around estimated spawn Explore this seed
#16

3513467580467267742

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
2,197 blocks
  • Swamp0
  • Village375
  • Ruined Portal382

Nearby biomes: Forest · Swamp · Dark Forest · Ocean · Plains · Windswept Savanna

Open in Seed Map →
Predicted biome map of Java 1.20 seed 5439679371178109856 around estimated spawn Explore this seed
#17

5439679371178109856

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Forest)
Stronghold
2,059 blocks
  • Swamp0
  • Pillager Outpost338
  • Ruined Portal385

Nearby biomes: Swamp · Cold Ocean · Forest · Taiga

Open in Seed Map →
Predicted biome map of Java 1.20 seed 5081940009533753259 around estimated spawn Explore this seed
#18

5081940009533753259

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
2,054 blocks
  • Swamp0
  • Ruined Portal272
  • Village275

Nearby biomes: Swamp · Taiga · Forest · Plains · River · Dripstone Caves

Open in Seed Map →
Predicted biome map of Java 1.20 seed 2285193164843217640 around estimated spawn Explore this seed
#19

2285193164843217640

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, -64 (Swamp)
Stronghold
1,634 blocks
  • Swamp0
  • Ruined Portal283
  • Woodland Mansion782

Nearby biomes: Swamp · Plains · Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed 2994686406823829609 around estimated spawn Explore this seed
#20

2994686406823829609

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-80, -176 (Windswept Savanna)
Stronghold
2,166 blocks
  • Swamp0
  • Ruined Portal272
  • Village318

Nearby biomes: Cold Ocean · Swamp · Ocean · Taiga · Windswept Forest · Deep Ocean

Open in Seed Map →
Predicted biome map of Java 1.20 seed -8380414790318967294 around estimated spawn Explore this seed
#21

-8380414790318967294

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
1,582 blocks
  • Swamp0
  • Ruined Portal365

Nearby biomes: Forest · Swamp · Plains · Windswept Hills · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed -2087675189094536154 around estimated spawn Explore this seed
#22

-2087675189094536154

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-64, 64 (Swamp)
Stronghold
2,380 blocks
  • Swamp0
  • Ruined Portal382

Nearby biomes: Swamp · Beach · Cold Ocean · Frozen Ocean · Deep Frozen Ocean · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed 8467385706675235457 around estimated spawn Explore this seed
#23

8467385706675235457

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-116, -48 (Swamp)
Stronghold
2,022 blocks
  • Swamp0
  • Village305

Nearby biomes: Swamp · Ocean · Beach · Forest · Deep Ocean · Plains

Open in Seed Map →
Predicted biome map of Java 1.20 seed 6376648548990545839 around estimated spawn Explore this seed
#24

6376648548990545839

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-176, -112 (Swamp)
Stronghold
1,954 blocks
  • Swamp0
  • Ruined Portal338

Nearby biomes: Swamp · Cold Ocean · Snowy Taiga · Frozen Ocean · Forest · Plains

Open in Seed Map →
Predicted biome map of Java 1.20 seed -3585787065073973216 around estimated spawn Explore this seed
#25

-3585787065073973216

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
8, 8 (Swamp)
Stronghold
1,769 blocks
  • Swamp0
  • Ruined Portal176

Nearby biomes: Swamp · Forest · Taiga · Beach

Open in Seed Map →
Predicted biome map of Java 1.20 seed -4074601347613797693 around estimated spawn Explore this seed
#26

-4074601347613797693

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
2,522 blocks
  • Swamp0
  • Ruined Portal148

Nearby biomes: Swamp · Ocean · Forest · River · Beach · Windswept Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed 3063146462851897673 around estimated spawn Explore this seed
#27

3063146462851897673

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-32, -32 (Old Growth Spruce Taiga)
Stronghold
1,823 blocks
  • Swamp0
  • Ruined Portal260

Nearby biomes: Swamp · Taiga · Windswept Forest · Old Growth Spruce Taiga · Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed 4724823557468293917 around estimated spawn Explore this seed
#28

4724823557468293917

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-24, -48 (Swamp)
Stronghold
2,438 blocks
  • Swamp0
  • Ruined Portal447

Nearby biomes: Swamp · Forest · Plains · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed -941502907877785901 around estimated spawn Explore this seed
#29

-941502907877785901

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
1,465 blocks
  • Swamp0
  • Ruined Portal295

Nearby biomes: Swamp · Taiga · Forest · Windswept Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed -7832415322126034797 around estimated spawn Explore this seed
#30

-7832415322126034797

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-16, -48 (Swamp)
Stronghold
2,475 blocks
  • Swamp0
  • Ruined Portal330

Nearby biomes: Swamp · Old Growth Spruce Taiga · Taiga · Forest · Ocean

Open in Seed Map →
Predicted biome map of Java 1.20 seed 3937596736673343925 around estimated spawn Explore this seed
#31

3937596736673343925

Swamp is 0 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
16, 0 (Swamp)
Stronghold
1,535 blocks
  • Swamp0
  • Ruined Portal280

Nearby biomes: Swamp · Forest · Ocean · Plains · Beach · Windswept Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed 5000278530277379250 around estimated spawn Explore this seed
#32

5000278530277379250

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Forest)
Stronghold
2,469 blocks
  • Swamp32
  • Ruined Portal198
  • Village410
  • Jungle Temple466

Nearby biomes: Swamp · Plains · Forest · River · Ocean · Birch Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed 3177141523318872158 around estimated spawn Explore this seed
#33

3177141523318872158

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
16, 136 (Swamp)
Stronghold
2,200 blocks
  • Swamp32
  • Ocean Monument225
  • Ruined Portal278

Nearby biomes: Deep Lukewarm Ocean · Ocean · Swamp · Old Growth Birch Forest · Lukewarm Ocean · Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed 3682510094334481768 around estimated spawn Explore this seed
#34

3682510094334481768

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-64, 80 (Plains)
Stronghold
2,451 blocks
  • Swamp32
  • Village250
  • Ruined Portal290

Nearby biomes: Ocean · Swamp · Beach · Plains · Forest · Lukewarm Ocean

Open in Seed Map →
Predicted biome map of Java 1.20 seed -3830452726242538277 around estimated spawn Explore this seed
#35

-3830452726242538277

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
2,350 blocks
  • Swamp32
  • Ruined Portal112
  • Village384

Nearby biomes: Swamp · Forest · Taiga · Plains · Old Growth Birch Forest · Windswept Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed -6011703674430388249 around estimated spawn Explore this seed
#36

-6011703674430388249

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Plains)
Stronghold
2,016 blocks
  • Swamp32
  • Ocean Monument405
  • Ruined Portal497

Nearby biomes: Swamp · Cold Ocean · Deep Cold Ocean · Deep Ocean · Windswept Hills · Windswept Savanna

Open in Seed Map →
Predicted biome map of Java 1.20 seed -4946976369029323263 around estimated spawn Explore this seed
#37

-4946976369029323263

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
16, 16 (Windswept Savanna)
Stronghold
1,983 blocks
  • Swamp32
  • Ruined Portal215

Nearby biomes: Swamp · Dark Forest · Ocean · River · Windswept Forest · Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed 7109588005264942325 around estimated spawn Explore this seed
#38

7109588005264942325

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Windswept Forest)
Stronghold
2,021 blocks
  • Swamp32
  • Ruined Portal144

Nearby biomes: Sparse Jungle · Old Growth Birch Forest · Birch Forest · Dark Forest · River · Windswept Savanna

Open in Seed Map →
Predicted biome map of Java 1.20 seed -1641877868149702608 around estimated spawn Explore this seed
#39

-1641877868149702608

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-32, -48 (Dark Forest)
Stronghold
2,597 blocks
  • Swamp32
  • Ruined Portal351

Nearby biomes: Forest · Ocean · Birch Forest · River · Beach · Windswept Savanna

Open in Seed Map →
Predicted biome map of Java 1.20 seed 834158251477154734 around estimated spawn Explore this seed
#40

834158251477154734

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-32, 0 (Plains)
Stronghold
1,591 blocks
  • Swamp32
  • Ruined Portal260

Nearby biomes: Ocean · Cold Ocean · Plains · Deep Ocean · Beach · Windswept Gravelly Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed -4265888948055034732 around estimated spawn Explore this seed
#41

-4265888948055034732

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Windswept Hills)
Stronghold
1,542 blocks
  • Swamp32
  • Ruined Portal304

Nearby biomes: Windswept Hills · Plains · Forest · Windswept Forest · River · Swamp

Open in Seed Map →
Predicted biome map of Java 1.20 seed 28851781932112503 around estimated spawn Explore this seed
#42

28851781932112503

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Old Growth Birch Forest)
Stronghold
2,161 blocks
  • Swamp32
  • Ruined Portal51

Nearby biomes: Swamp · Ocean · Forest · Beach · Plains · Birch Forest

Open in Seed Map →
Predicted biome map of Java 1.20 seed -7285150659515825118 around estimated spawn Explore this seed
#43

-7285150659515825118

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-192, -92 (Beach)
Stronghold
2,480 blocks
  • Swamp32
  • Ocean Monument366

Nearby biomes: Ocean · Deep Ocean · Savanna · Flower Forest · Plains · Swamp

Open in Seed Map →
Predicted biome map of Java 1.20 seed -8409350546945411912 around estimated spawn Explore this seed
#44

-8409350546945411912

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
-16, 48 (Dark Forest)
Stronghold
2,020 blocks
  • Swamp32
  • Ruined Portal318

Nearby biomes: Swamp · Ocean · Dark Forest · Forest · Plains · Beach

Open in Seed Map →
Predicted biome map of Java 1.20 seed -5409995354125665350 around estimated spawn Explore this seed
#45

-5409995354125665350

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Swamp)
Stronghold
2,375 blocks
  • Swamp32
  • Ruined Portal129

Nearby biomes: Swamp · Birch Forest · Forest · River · Dark Forest · Old Growth Spruce Taiga

Open in Seed Map →
Predicted biome map of Java 1.20 seed 8321196160999645567 around estimated spawn Explore this seed
#46

8321196160999645567

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 276 (Windswept Savanna)
Stronghold
1,535 blocks
  • Swamp32
  • Ruined Portal387

Nearby biomes: Ocean · Cold Ocean · Plains · Forest · Beach

Open in Seed Map →
Predicted biome map of Java 1.20 seed -4951529724949180620 around estimated spawn Explore this seed
#47

-4951529724949180620

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Forest)
Stronghold
1,868 blocks
  • Swamp32
  • Ruined Portal253

Nearby biomes: Swamp · Forest · Birch Forest · Old Growth Birch Forest · Windswept Forest · Windswept Hills

Open in Seed Map →
Predicted biome map of Java 1.20 seed 2622576477613734204 around estimated spawn Explore this seed
#48

2622576477613734204

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
0, 0 (Birch Forest)
Stronghold
1,920 blocks
  • Swamp32
  • Ruined Portal192

Nearby biomes: Swamp · Forest · Dark Forest · Old Growth Birch Forest · Windswept Forest · Taiga

Open in Seed Map →
Predicted biome map of Java 1.20 seed -4663698871280833274 around estimated spawn Explore this seed
#49

-4663698871280833274

Swamp is 32 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
16, 8 (Dark Forest)
Stronghold
2,144 blocks
  • Swamp32
  • Ruined Portal208

Nearby biomes: Ocean · Deep Ocean · Swamp · Beach · River

Open in Seed Map →
Predicted biome map of Java 1.20 seed -5709324940411881051 around estimated spawn Explore this seed
#50

-5709324940411881051

Swamp is 45 blocks from estimated spawn. Open the map to see the terrain around it.

Estimated spawn
16, -16 (Windswept Savanna)
Stronghold
2,198 blocks
  • Swamp45
  • Ocean Monument330
  • Village363
  • Ruined Portal477

Nearby biomes: Ocean · Swamp · Plains · Flower Forest · Deep Ocean · Forest

Open in Seed Map →

About these 1.20 seeds

A swamp biome sample within 160 blocks of estimated spawn is required for every seed in this category. Lists are computed separately for the version printed on each card.

1.20 (Trails & Tales) added cherry groves and buried trail ruins to world generation, and 1.20.1 is one of the most-pinned modpack versions — plenty of worlds are still being started on it. Every seed below was verified on 1.20's own generation, not back-ported from a newer list: 1.21 changed worldgen (trial chambers, then the pale garden), so a list verified there can't honestly claim these coordinates.

Verified for Java Edition 1.20 (Trails & Tales). Biomes, terrain and structures are identical across 1.20 – 1.20.6, so any 1.20.x world matches these maps — the only generation change in the patches (1.20.2 made diamond ore more common in the deepslate layers) doesn't affect anything these cards measure.

For the current Java 26.3 release, see the main swamp seeds — or the same list for 26.3 · 1.21.4 · 1.19 · 1.18 · 1.16. All 1.20 lists live under best 1.20 seeds.

Frequently asked questions

How is this different from the main swamp seeds page?
These seeds are computed for Java 1.20. The main swamp seeds list targets Java 26.3. Match the version on the card; older versions can generate different biomes and structure positions.
Which releases do these seeds work on?
The whole 1.20 line — 1.20 through 1.20.6, including 1.20.1 modpacks: biomes, terrain and structure positions are identical across the patches. (The one generation change, 1.20.2 making diamond ore more common in the deepslate layers, doesn't move anything on these cards.) On 1.21+ the same seed generates almost the same world, but trial chambers (1.21) and pale gardens (1.21.4) appear and a few placements shift, so use our main lists for current versions.
Do these seeds work on Bedrock Edition?
No — Java and Bedrock generate different worlds from the same seed. These lists are Java Edition only.