Minecraft 1.21 Mushroom Island Seeds

Of 1,800 Java 1.21.11 seeds, 288 hold a mushroom island within 1,500 blocks of spawn. The closest hit is 312 blocks away and the usual distance is about 482 blocks. The top seed starts you in a desert, so a boat and a pile of supplies are part of the adventure.

1.21 mushroom island: 20 of 1,800 tested seeds · Java 1.21.11 · 2026-10-31

1. 1
   5439435130326695526A75/100

   Spawn in desert at X -64, Z -544

   • Mushroom Fields 312 blocks X -56, Z -232
   • Stronghold 2057 blocks
   • Village 653 blocks
   Open mapCopy seed
2. 2
   -7669802802161694917A72/100

   Spawn in snowy taiga at X -80, Z -224

   • Mushroom Fields 340 blocks X 168, Z 8
   • Stronghold 1721 blocks
   • Village 122 blocks
   Open mapCopy seed
3. 3
   5628995102175821506B63/100

   Spawn in snowy taiga at X -64, Z -80

   • Mushroom Fields 340 blocks X 104, Z 216
   • Stronghold 1908 blocks
   • Village 788 blocks
   Open mapCopy seed
4. 4
   5243980254243106261S83/100

   Spawn in plains at X -48, Z -256

   • Mushroom Fields 430 blocks X 248, Z 56
   • Stronghold 1558 blocks
   • Village 229 blocks
   Open mapCopy seed
5. 5
   1701690861745622019A77/100

   Spawn in desert at X -624, Z -256

   • Mushroom Fields 426 blocks X -424, Z 120
   • Stronghold 1759 blocks
   • Village 311 blocks
   Open mapCopy seed
6. 6
   8121258522820632922S90/100

   Spawn in plains at X 464, Z -64

   • Mushroom Fields 476 blocks X 40, Z -280
   • Stronghold 1362 blocks
   • Village 318 blocks
   Open mapCopy seed
7. 7
   3377906114894308776S88/100

   Spawn in plains at X -176, Z -624

   • Mushroom Fields 487 blocks X 152, Z -264
   • Stronghold 1479 blocks
   • Village 273 blocks
   Open mapCopy seed
8. 8
   -4869264502730919221S88/100

   Spawn in plains at X -368, Z -320

   • Mushroom Fields 492 blocks X 88, Z -504
   • Stronghold 2060 blocks
   • Village 193 blocks
   Open mapCopy seed
9. 9
   -77135210150915966A71/100

   Spawn in savanna at X -496, Z 112

   • Mushroom Fields 442 blocks X -120, Z 344
   • Stronghold 1301 blocks
   • Village 66 blocks
   Open mapCopy seed
10. 10
    -3660122576220319018S85/100

    Spawn in windswept savanna at X -640, Z 992

    • Mushroom Fields 505 blocks X -136, Z 1016
    • Stronghold 1388 blocks
    • Village 352 blocks
    Open mapCopy seed
11. 11
    -3915959762799992060S88/100

    Spawn in forest at X -48, Z 96

    • Mushroom Fields 527 blocks X 408, Z -168
    • Stronghold 1370 blocks
    • Village 375 blocks
    Open mapCopy seed
12. 12
    2426274606300589249A77/100

    Spawn in plains at X -864, Z -784

    • Mushroom Fields 491 blocks X -392, Z -648
    • Stronghold 1744 blocks
    • Village 728 blocks
    Open mapCopy seed
13. 13
    -3681174704410229325S83/100

    Spawn in jungle at X -720, Z -368

    • Mushroom Fields 541 blocks X -248, Z -104
    • Stronghold 1337 blocks
    • Village 849 blocks
    Open mapCopy seed
14. 14
    -3580538890769411190A78/100

    Spawn in snowy plains at X 320, Z -544

    • Mushroom Fields 526 blocks X -184, Z -392
    • Stronghold 1052 blocks
    • Village 595 blocks
    Open mapCopy seed
15. 15
    -1387367278347787011A78/100

    Spawn in flower forest at X 240, Z 144

    • Mushroom Fields 532 blocks X -152, Z 504
    • Stronghold 1736 blocks
    • Village 680 blocks
    Open mapCopy seed
16. 16
    3853614512449168722A69/100

    Spawn in snowy taiga at X 16, Z 176

    • Mushroom Fields 501 blocks X 488, Z 8
    • Stronghold 1556 blocks
    • Village 997 blocks
    Open mapCopy seed
17. 17
    2229264955167436817S86/100

    Spawn in forest at X -32, Z -48

    • Mushroom Fields 566 blocks X 376, Z 344
    • Stronghold 1666 blocks
    • Village 195 blocks
    Open mapCopy seed
18. 18
    -3989606758453304551S81/100

    Spawn in plains at X 288, Z 272

    • Mushroom Fields 553 blocks X -264, Z 296
    • Stronghold 1618 blocks
    • Village 1341 blocks
    Open mapCopy seed
19. 19
    -2642695266090971706S84/100

    Spawn in sunflower plains at X 336, Z -240

    • Mushroom Fields 569 blocks X -168, Z 24
    • Stronghold 1632 blocks
    • Village 288 blocks
    Open mapCopy seed
20. 20
    7644722316997024363S82/100

    Spawn in savanna at X -96, Z -64

    • Mushroom Fields 579 blocks X 280, Z 376
    • Stronghold 2036 blocks
    • Village 238 blocks
    Open mapCopy seed

Why 1.21 mushroom islands are ocean-bound

Since the 1.18 terrain rewrite, mushroom fields generate only where the continentalness is at its lowest. In practice that means mushroom islands are small landmasses surrounded by deep ocean, rarely touching a mainland.

A 312 block distance is therefore a deliberate sea crossing, not a walk. Take a boat, preferably a chest boat or a bamboo raft with chest, so you can transport tools and food.

• Pack at least two stacks of blocks, in case you need a bridge to the island's edge.
• Bring a bed or two to set your respawn there.
• Carry a map or note coordinates from the seed map.

Once ashore, the island is a calm base. Hostile mobs do not spawn naturally in the biome, mooshrooms replace cows, and mycelium lets mushrooms grow anywhere with space.

Desert-start logistics for an island base

The top seed begins in a desert, which means little wood and plenty of sand. Plan your supplies before sailing.

Look for these in the first hour:

• A desert pyramid or well, which can hold gold, emeralds and a chance at suspicious sand for archaeology.
• Cactus and dead bushes for a few sticks, but real trees are rare here.
• Sand and clay for glass and brick building once you have a furnace.

Find the nearest forest or savanna to collect logs, then head for the coast. Wood matters because the island has almost no trees, so carry saplings across and plant them in the mycelium.

On the island, use bowls with mooshrooms for stew, shear for mushrooms, and build with giant mushroom blocks. Light the shoreline to keep stray mobs from arriving, then settle in.

Read how the seed hunter picks and rates seeds.

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