Rust Map Seeds and Sizes for Your Server (2026)

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How Rust map seeds work, how to find and check one on RustMaps, which map size fits your player count, and what to recheck before the November 2026 wipe.

Rust logo in front of a forest and a large satellite dish at dusk

You need a seed for your Rust server, probably for the forced wipe expected on Thursday 5 November 2026, and the lists of best Rust map seeds you find were made on older patches. Here is what a seed decides, how to check one on RustMaps, and which size and monuments to look for.

Quick answer: Rust map seeds are numbers from 0 to 2,147,483,647. Together with the world size (1000 to 6000), the seed decides the whole procedural map: terrain, biomes, rivers, roads and where each monument lands. The same seed and size give the same map on the same game version, but an update can change how a seed generates, so lists of "best seeds" go stale. Search the RustMaps gallery at your exact size, check the monuments and biomes you care about, then set server.seed and server.worldsize to the same values. Most community servers do well between 3000 and 4500. Check your seed again after the November update.

How Rust map seeds work

A procedural map comes from two startup values. Facepunch's server guide describes them like this:

SettingWhat Facepunch says it doesAllowed values
server.seed"Sets the random seed for how the map is generated""any value 0-2147483647"
server.worldsizeSets the world size. "The larger the map, the more disk space and memory you need.""Use 1000 to 6000"

This is the map part of Facepunch's example start line for Windows:

RustDedicated.exe -batchmode +server.level "Procedural Map" +server.seed 1234 +server.worldsize 4000

The server names the map file after both values (proceduralmap.SIZE.SEED.map), and the .sav file with every building carries the map's name, says Facepunch's wiki page on the identity folder. So on a live server, changing either value is a map wipe.

Two details catch people out:

  • Same seed, same size, same version. The pair rebuilds the same map only on the same game version. The September 2026 Breach and Clear changelist, for example, lists "Improved rock and cliff spawning on procedural maps". RustMaps keeps procedural maps "until the next force wipe" (retention guide).
  • The size is part of the seed. Seed 1234 at 3500 and seed 1234 at 4000 are two different maps, so a seed tip without its size tells you nothing.

Where to find Rust map seeds

The usual place to look is RustMaps. Its Map Generator guide says it builds procedural maps from a seed and a size "the same way the vanilla game does", with a viewer for "monuments, biomes, roads and more". Every generated map is public, and the gallery on the RustMaps front page searches them all, with filters for monuments, biome percentages and map features.

  1. Set your exact world size first.
  2. Filter on the monuments you need (see the checklist below) and on biome share.
  3. Open the candidates. A map's address is rustmaps.com/map/<size>_<seed>, so a shortlist is easy to share with your staff or players.
  4. To try a seed nobody has generated yet, use the Map Generator. It sits in the RustMaps dashboard, so you need to log in.

Seeds from Reddit, Discord or older blog posts are leads, not answers: look each one up at your size on the current version first. That is also why this guide has no list of best seeds; one we cannot check on the current version could point you to a map that no longer matches its description.

Which map size fits your player count

Facepunch gives the range and the trade-off, but no table per player count. These are our starting points, counted by players online at your peak, not by slots:

Players online at peakStart withWhy
Up to 302500 to 3000Short runs and regular contact. Check that the monuments you want fit
30 to 753000 to 3500Room to build apart while monuments stay busy
75 to 1503500 to 4000Space for many groups without endless runs
150 and more4000 to 4500Go bigger only when your peak really fills the map

Some reference points:

  • Facepunch's example start line uses 4000, and in September 2026 Facepunch reduced the map size on its EU Hardcore 1 and US East Hardcore 1 servers from 4250 to 3750 (Breach and Clear).
  • On the last day of a wipe cycle, road Bradleys start roaming, and Facepunch's wipe timer page puts their number at WorldSize / 1000 * 2: 6 on a 3000 map, 8 on a 4000 map.
  • Facepunch's requirements list 12 GB of free RAM, note that a 6000 map will use more, and say the values "highly depend on the use case and population of the server". Size the map for the population you have, not the one you hope for.

What to check on a seed in 2026

The old rules still apply: monuments spread out instead of stacked in one corner, flat ground for bases near them, a buildable coast and roads between the big monuments. Recent updates add a few things to check on the preview:

  • Power Plant. Since the August 2026 Power Trip update, players restart it with Heavy Fuses. Once it runs, powerline poles along the roads supply power for circuits, green recyclers outside safe zones work at 60% instead of 50%, the Supermarket freezer works and a switch on the Large Oil Rig pumps crude oil to the Dome. September tied the Drone Marketplace to it, and the October Livestock Update added loot rooms that need its power at Airfield, Ferry Terminal, Harbour, Junkyard, Launch Site, Military Tunnels, Nuclear Missile Silo, Radtown, Sewer Branch, Trainyard and Water Treatment Plant. Make sure your seed has one.
  • Jungle share. The Jungle biome from the May 2025 Jungle Update "covers part of the temperate coastal (tier 0) area where new players spawn", with flatter terrain, more rivers, thicker foliage, the Jungle Ziggurat and small Jungle Ruins. The HQM ore nodes added in September 2026 are "extremely scarce", and Facepunch says you have more luck finding them in the Jungle.
  • Rivers. Since the Jungle Update, rivers are "longer, wider, and deeper" and have to be swum across, so a river between the spawn beaches and the main roads slows everyone down. Since the April 2026 Spring Clean update, water wheels in rivers generate power, which builders will want.
  • Coastline. Boats also lead to the Deep Sea, the offshore region from the February 2026 Naval Update that "will open and close intermittently, like a world event", so usable bays count for more.
  • Apartment Complex. The July 2026 Common Ground monument lets players "getting started with a wipe" rent a room. If your seed has one, see how far it is from the spawn beaches.
  • Safe zones. Outpost and Bandit Camp should both be on the map and reachable.

What to weigh most depends on your server:

Server typeLook for on the preview
Large PvPLaunch Site, Military Tunnels, Airfield, Power Plant and both oil rigs spread out, so no single group holds them all
Builders and PvEFlat ground near roads with powerline poles, rivers for water wheels
New-player friendlyJungle and the Apartment Complex near the spawn beaches, Outpost within reach

Check a seed before wipe day

  1. Shortlist three to five seeds at your exact size and run the checklist above on each, including roads, rails and rivers between the big monuments.
  2. Before a monthly update, check your pick again on the next version. RustMaps' staging guide says it aims to turn on staging generation "between 7 and 3 days before force wipe" and makes staging maps the default "roughly 1 hour before force wipe". Staging maps are only meant for servers that already run the new update.
  3. Let your players vote between two or three finalists; RustMaps names map votes as one use of its staging maps.
  4. On wipe day, stop the server, delete the .map and .sav files (and the player.blueprints file only if you also wipe blueprints), set the new seed and size, start it and fly over the map as an admin before you announce it.

On a Space-Node Rust server you set the seed and world size in the control panel, and custom maps go up through the panel or SFTP.

The November 2026 force wipe

Rust's monthly forced wipe falls on the first Thursday of the month at 19:00 London time, the default in Facepunch's wipe timer, and every monthly update in 2026 so far came out on a first Thursday. The UK moved from BST to GMT on Sunday 25 October, as Facepunch reminded in its Halloween 2026 post, so Thursday 5 November means 19:00 UTC, 20:00 in Amsterdam and Berlin and 14:00 in New York. The same post says the Halloween event "will run until November 5th".

What that means for your seed:

  • On 31 October 2026 Facepunch had not announced a date or published notes for the November update. The newest post on rust.facepunch.com/news was Halloween 2026 from 22 October.
  • The fourth quarter of Facepunch's 2026 roadmap (last updated 27 August) lists Rust Premium, animals, dogs, a biofuel generator, player customisation and a bug reward system. None of it is about map generation; procedural caves and terrain deformation sit on the 2027 list. The size advice above stands.
  • Small generation changes rarely make the headlines, as September's rock and cliff line shows, so check your seed on the new version anyway.
  • Facepunch's staging branch has its map wipes "one week prior to regular Rust", so the next build is already in testing there. Our staging branch guide covers plugin tests on it, and our Halloween update checklist has the expected November time in more time zones.

Same seed every wipe or a new one?

The same seed lets players learn the map and plan ahead, which gives regulars an edge over newcomers. A new seed every wipe puts everybody back at the start. A rotation of three or four checked seeds sits in between: known maps return every few months, and a vote between the next two keeps players involved.

FAQ

What are the best Rust map seeds? No seed stays the best. A seed only describes a map together with its size and the game version, and Facepunch changes generation now and then. The best seed for your server has the monuments, biomes and coast your players want at your size, checked on RustMaps for the current version.

What is a good seed for a 3000 or 3500 Rust map? Set the size in the RustMaps gallery to exactly 3000 or 3500 first, because the same seed at another size is a different map. Then filter for a Power Plant, both oil rigs and the other monuments you want, and compare three to five results.

How do I use a seed from RustMaps on my server? Set server.seed and server.worldsize to the seed and size of the map you picked, as RustMaps' own guide says. Your server generates the map itself, so you need no map file, as long as it runs the same game version as the map you looked at. Change it at a wipe, because a new seed means a new world.

Do Rust map seeds change after an update? They can. The numbers stay the same, but the generation behind them changes now and then, as with September 2026's "Improved rock and cliff spawning on procedural maps". RustMaps offers staging maps of the next version a few days before each force wipe.

Will the November 2026 update change map generation? Facepunch had not published notes for it on 31 October 2026, and its roadmap for late 2026 lists no map generation work. Check your seed again anyway after the update expected at 19:00 UTC on 5 November.

What map size should I use for my Rust server? Size it to the players online at your peak: about 2500 to 3000 for up to 30, 3000 to 3500 for up to 75, 3500 to 4000 for up to 150 and 4000 to 4500 above that. Rust accepts 1000 to 6000, and larger maps need more disk space and memory.

Sources

All opened on 31 October 2026: