diff --git a/nixos/doc/manual/release-notes/rl-2411.section.md b/nixos/doc/manual/release-notes/rl-2411.section.md
index 9c4e9a2ec66a..15f2d58b93f4 100644
--- a/nixos/doc/manual/release-notes/rl-2411.section.md
+++ b/nixos/doc/manual/release-notes/rl-2411.section.md
@@ -10,6 +10,8 @@
   This also allows configuring runtime settings of AMDVLK and enabling experimental features.
 - The `moonlight-qt` package ([Moonlight game streaming](https://moonlight-stream.org/)) now has HDR support on Linux systems.
 
+- PostgreSQL now defaults to major version 16.
+
 - `authelia` has been upgraded to version 4.38. This version brings several features and improvements which are detailed in the [release blog post](https://www.authelia.com/blog/4.38-release-notes/).
   This release also deprecates some configuration keys, which are likely to be removed in future version 5.0, but they are still supported and expected to be working in the current version.
 
diff --git a/nixos/modules/services/databases/postgresql.nix b/nixos/modules/services/databases/postgresql.nix
index 8a9d8c210b34..55b3dd282ec4 100644
--- a/nixos/modules/services/databases/postgresql.nix
+++ b/nixos/modules/services/databases/postgresql.nix
@@ -483,7 +483,8 @@ in
 
     services.postgresql.package = let
         mkThrow = ver: throw "postgresql_${ver} was removed, please upgrade your postgresql version.";
-        base = if versionAtLeast config.system.stateVersion "23.11" then pkgs.postgresql_15
+        base = if versionAtLeast config.system.stateVersion "24.11" then pkgs.postgresql_16
+            else if versionAtLeast config.system.stateVersion "23.11" then pkgs.postgresql_15
             else if versionAtLeast config.system.stateVersion "22.05" then pkgs.postgresql_14
             else if versionAtLeast config.system.stateVersion "21.11" then pkgs.postgresql_13
             else if versionAtLeast config.system.stateVersion "20.03" then mkThrow "11"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 060a9f556e57..235ca173d66e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -25885,20 +25885,20 @@ with pkgs;
     postgresql_15_jit
     postgresql_16_jit
   ;
-  postgresql = postgresql_15;
-  postgresql_jit = postgresql_15_jit;
+  postgresql = postgresql_16;
+  postgresql_jit = postgresql_16_jit;
   postgresqlPackages = recurseIntoAttrs postgresql.pkgs;
   postgresqlJitPackages = recurseIntoAttrs postgresql_jit.pkgs;
   postgresql12Packages = recurseIntoAttrs postgresql_12.pkgs;
   postgresql13Packages = recurseIntoAttrs postgresql_13.pkgs;
   postgresql14Packages = recurseIntoAttrs postgresql_14.pkgs;
-  postgresql16Packages = recurseIntoAttrs postgresql_16.pkgs;
+  postgresql15Packages = recurseIntoAttrs postgresql_15.pkgs;
   postgresql12JitPackages = recurseIntoAttrs postgresql_12_jit.pkgs;
   postgresql13JitPackages = recurseIntoAttrs postgresql_13_jit.pkgs;
   postgresql14JitPackages = recurseIntoAttrs postgresql_14_jit.pkgs;
   postgresql15JitPackages = recurseIntoAttrs postgresql_15_jit.pkgs;
   postgresql16JitPackages = recurseIntoAttrs postgresql_16_jit.pkgs;
-  postgresql15Packages = postgresqlPackages;
+  postgresql16Packages = postgresqlPackages;
 
   postgresql_jdbc = callPackage ../development/java-modules/postgresql_jdbc { };