diff --git a/pkgs/applications/networking/cluster/k3s/1_31/chart-versions.nix b/pkgs/applications/networking/cluster/k3s/1_31/chart-versions.nix
deleted file mode 100644
index 7f65917312ed..000000000000
--- a/pkgs/applications/networking/cluster/k3s/1_31/chart-versions.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  traefik-crd = {
-    url = "https://k3s.io/k3s-charts/assets/traefik-crd/traefik-crd-27.0.201+up27.0.2.tgz";
-    sha256 = "0vwprcb60y15sc4lmi58gl1zr3yhsq43jlbsfm7gs20ci90frv16";
-  };
-  traefik = {
-    url = "https://k3s.io/k3s-charts/assets/traefik/traefik-27.0.201+up27.0.2.tgz";
-    sha256 = "12dp1r82qfzqfzs4sfxc54rnw8kv42a3w4gpk5v3qkhqm6fkrnn1";
-  };
-}
diff --git a/pkgs/applications/networking/cluster/k3s/1_31/images-versions.json b/pkgs/applications/networking/cluster/k3s/1_31/images-versions.json
deleted file mode 100644
index a17aa3bd84cc..000000000000
--- a/pkgs/applications/networking/cluster/k3s/1_31/images-versions.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  "airgap-images-amd64-tar-gz": {
-    "url": "https://github.com/k3s-io/k3s/releases/download/v1.31.14%2Bk3s1/k3s-airgap-images-amd64.tar.gz",
-    "sha256": "d6a0e04f107d223795869aa839b1e504716c4d90f40411cc158bd565c4bef171"
-  },
-  "airgap-images-amd64-tar-zst": {
-    "url": "https://github.com/k3s-io/k3s/releases/download/v1.31.14%2Bk3s1/k3s-airgap-images-amd64.tar.zst",
-    "sha256": "616b23148d7f81128861aa3793e972ffc8419f7f674eab6b248bd9e33d805696"
-  },
-  "airgap-images-arm-tar-gz": {
-    "url": "https://github.com/k3s-io/k3s/releases/download/v1.31.14%2Bk3s1/k3s-airgap-images-arm.tar.gz",
-    "sha256": "46519a25426c7db9ca8828fa518c7918d26c1088b48d5b309fd77e81a73e500d"
-  },
-  "airgap-images-arm-tar-zst": {
-    "url": "https://github.com/k3s-io/k3s/releases/download/v1.31.14%2Bk3s1/k3s-airgap-images-arm.tar.zst",
-    "sha256": "082c8b305b73b1a678c1d6549b77eae1d44b2f954d07d76acf9c13181a0b0718"
-  },
-  "airgap-images-arm64-tar-gz": {
-    "url": "https://github.com/k3s-io/k3s/releases/download/v1.31.14%2Bk3s1/k3s-airgap-images-arm64.tar.gz",
-    "sha256": "8ff705955f8c199b92a35554ed3c154c37920a5c6e6a46a9c18f884b979ea391"
-  },
-  "airgap-images-arm64-tar-zst": {
-    "url": "https://github.com/k3s-io/k3s/releases/download/v1.31.14%2Bk3s1/k3s-airgap-images-arm64.tar.zst",
-    "sha256": "b0968e1bf34d1109572e3795bae315ae7609be69b1c1f87dc0d6fce072790fe7"
-  }
-}
diff --git a/pkgs/applications/networking/cluster/k3s/1_31/versions.nix b/pkgs/applications/networking/cluster/k3s/1_31/versions.nix
deleted file mode 100644
index 211e796b63d1..000000000000
--- a/pkgs/applications/networking/cluster/k3s/1_31/versions.nix
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  k3sVersion = "1.31.14+k3s1";
-  k3sCommit = "a2ef79f53538e58982857c1820469792d582e470";
-  k3sRepoSha256 = "0rww4z63vf13g3rssqfmp9444bs1mzb1y6wddysqfxj8fm3kakwl";
-  k3sVendorHash = "sha256-FBNHUk04m8El4oTyJMznv8eyT8DSt5Q3ypqL9qT/WDU=";
-  chartVersions = import ./chart-versions.nix;
-  imagesVersions = builtins.fromJSON (builtins.readFile ./images-versions.json);
-  k3sRootVersion = "0.15.0";
-  k3sRootSha256 = "008n8xx7x36y9y4r24hx39xagf1dxbp3pqq2j53s9zkaiqc62hd0";
-  k3sCNIVersion = "1.8.0-k3s1";
-  k3sCNISha256 = "04xig5spp81l81781ixmk99ghiz8lk0p16zhcbja5mslfdjmc7vg";
-  containerdVersion = "2.1.5-k3s1.32";
-  containerdSha256 = "1fzld9q0ycfg9b3054qg70mif1p6i7xqikcbabrmxapk81fy83kn";
-  criCtlVersion = "1.31.0-k3s2";
-}
diff --git a/pkgs/applications/networking/cluster/k3s/default.nix b/pkgs/applications/networking/cluster/k3s/default.nix
index 9e9699fcd515..7825f8173191 100644
--- a/pkgs/applications/networking/cluster/k3s/default.nix
+++ b/pkgs/applications/networking/cluster/k3s/default.nix
@@ -12,16 +12,6 @@ let
   extraArgs = removeAttrs args [ "callPackage" ];
 in
 {
-  k3s_1_31 = common (
-    (import ./1_31/versions.nix)
-    // {
-      updateScript = [
-        ./update-script.sh
-        "31"
-      ];
-    }
-  ) extraArgs;
-
   k3s_1_32 = common (
     (import ./1_32/versions.nix)
     // {
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index ef1f4a631016..ee182103d42b 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -773,6 +773,7 @@ mapAliases {
   julia_19-bin = throw "Julia 1.9 has reached its end of life and 'julia_19-bin' has been removed. Please use a supported version."; # Added 2025-10-29
   k2pdfopt = throw "'k2pdfopt' has been removed from nixpkgs as it was broken"; # Added 2025-09-27
   k3s_1_30 = throw "'k3s_1_30' has been removed from nixpkgs as it has reached end of life"; # Added 2025-09-01
+  k3s_1_31 = throw "'k3s_1_31' has been removed from nixpkgs as it has reached end of life"; # Added 2025-12-08
   kak-lsp = throw "'kak-lsp' has been renamed to/replaced by 'kakoune-lsp'"; # Converted to throw 2025-10-27
   kanidm = warnAlias "'kanidm' will be removed before 26.05. You must use a versioned package, e.g. 'kanidm_1_x'." kanidm_1_7; # Added 2025-09-01
   kanidm_1_4 = throw "'kanidm_1_4' has been removed as it has reached end of life"; # Added 2025-06-18
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 33a0ba1c6d7e..86706cb85b4d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11284,7 +11284,6 @@ with pkgs;
   jwm-settings-manager = callPackage ../applications/window-managers/jwm/jwm-settings-manager.nix { };
 
   inherit (callPackage ../applications/networking/cluster/k3s { })
-    k3s_1_31
     k3s_1_32
     k3s_1_33
     k3s_1_34