diff --git a/pkgs/development/libraries/protobuf/26.nix b/pkgs/development/libraries/protobuf/26.nix
deleted file mode 100644
index 5751ef7c3217..000000000000
--- a/pkgs/development/libraries/protobuf/26.nix
+++ /dev/null
@@ -1,9 +0,0 @@
-{ callPackage, ... }@args:
-
-callPackage ./generic.nix (
-  {
-    version = "26.1";
-    hash = "sha256-9sA+MYeDqRZl1v6HV4mpy60vqTbVTtinp9er6zkg/Ng=";
-  }
-  // args
-)
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 5ededf92d272..d10327ff4865 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1639,6 +1639,7 @@ mapAliases {
   prometheus-minio-exporter = throw "'prometheus-minio-exporter' has been removed from nixpkgs, use Minio's built-in Prometheus integration instead"; # Added 2024-06-10
   prometheus-tor-exporter = throw "'prometheus-tor-exporter' has been removed from nixpkgs, as it was broken and unmaintained"; # Added 2024-10-30
   protobuf_23 = throw "'protobuf_23' has been removed from nixpkgs. Consider using a more recent version of the protobuf library"; # Added 2025-04-20
+  protobuf_26 = throw "'protobuf_26' has been removed from nixpkgs. Consider using a more recent version of the protobuf library"; # Added 2025-06-29
   protobuf_28 = throw "'protobuf_28' has been removed from nixpkgs. Consider using a more recent version of the protobuf library"; # Added 2025-06-14
   protobuf3_24 = protobuf_24;
   protobuf3_23 = protobuf_23;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d83ddc23d9e2..dc7671440a01 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9238,7 +9238,6 @@ with pkgs;
       protobuf_30 = callPackage ../development/libraries/protobuf/30.nix { };
       protobuf_29 = callPackage ../development/libraries/protobuf/29.nix { };
       protobuf_27 = callPackage ../development/libraries/protobuf/27.nix { };
-      protobuf_26 = callPackage ../development/libraries/protobuf/26.nix { };
       protobuf_25 = callPackage ../development/libraries/protobuf/25.nix { };
       protobuf_24 = callPackage ../development/libraries/protobuf/24.nix { };
       protobuf_21 = callPackage ../development/libraries/protobuf/21.nix {
@@ -9249,7 +9248,6 @@ with pkgs;
     protobuf_30
     protobuf_29
     protobuf_27
-    protobuf_26
     protobuf_25
     protobuf_24
     protobuf_21