diff --git a/flake.nix b/flake.nix
index beb7cdb..7b197d7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -106,6 +106,7 @@
         {
           login-manager.greetd.enable = desktop == "sway";
           my.gnome.enable = desktop == "gnome";
+          my.cosmic.enable = desktop == "cosmic";
           my.kde.enable = desktop == "kde";
         }
 
diff --git a/system/configuration.nix b/system/configuration.nix
index 69badf0..e79ad12 100644
--- a/system/configuration.nix
+++ b/system/configuration.nix
@@ -31,6 +31,7 @@
     ./sops.nix
     ./greetd.nix
     ./gnome.nix
+    ./cosmic.nix
     ./kde.nix
     ./home-manager.nix
     ../settings
diff --git a/system/cosmic.nix b/system/cosmic.nix
new file mode 100644
index 0000000..9b1a34b
--- /dev/null
+++ b/system/cosmic.nix
@@ -0,0 +1,30 @@
+{
+  config,
+  lib,
+  ...
+}:
+{
+  options.my.cosmic.enable = lib.mkEnableOption { };
+
+  config = lib.mkIf config.my.cosmic.enable {
+    # See https://wiki.nixos.org/wiki/COSMIC
+    services.displayManager.cosmic-greeter.enable = true;
+    services.desktopManager.cosmic.enable = true;
+
+    # Same as GNOME: avoids conflict with graphics manager autologin
+    # (e.g.: https://github.com/NixOS/nixpkgs/issues/103746)
+    systemd.services."getty@tty1".enable = false;
+    systemd.services."autovt@tty1".enable = false;
+
+    services.displayManager.autoLogin = {
+      enable = true;
+      user = config.my.username;
+    };
+
+    programs.dconf.enable = true;
+
+    programs.kdeconnect.enable = true;
+
+    hardware.opentabletdriver.enable = lib.mkForce false;
+  };
+}
diff --git a/user/cosmic.nix b/user/cosmic.nix
new file mode 100644
index 0000000..9ca81b6
--- /dev/null
+++ b/user/cosmic.nix
@@ -0,0 +1,42 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+lib.mkIf (config.my.desktop == "cosmic") {
+
+  home.pointerCursor = {
+    name = "Adwaita";
+    size = 24;
+    package = pkgs.adwaita-icon-theme;
+    gtk.enable = true;
+  };
+
+  home.packages = with pkgs; [
+    adw-gtk3
+
+    newsflash
+    foliate
+    amberol
+    pitivi
+    keepassxc
+    menulibre
+
+    libsForQt5.qt5ct
+    libsForQt5.qtstyleplugin-kvantum
+    qt6Packages.qt6ct
+    qt6Packages.qtstyleplugin-kvantum
+  ];
+
+  services.gpg-agent.pinentry.package = lib.mkForce pkgs.pinentry-gnome3;
+
+  xdg.defaultApplications = {
+    enable = lib.mkForce false;
+  };
+
+  # Wiki COSMIC: Firefox ignores DE theme because of libadwaita
+  programs.firefox.profiles.dev-edition-default.settings = {
+    "widget.gtk.libadwaita-colors.enabled" = false;
+  };
+}
diff --git a/user/dummy.nix b/user/dummy.nix
index 7a0aac4..b19b7b9 100644
--- a/user/dummy.nix
+++ b/user/dummy.nix
@@ -6,6 +6,7 @@
     media-packages.enable = lib.mkEnableOption { };
     containers.enable = lib.mkEnableOption { };
     gnome.enable = lib.mkEnableOption { };
+    cosmic.enable = lib.mkEnableOption { };
     kde.enable = lib.mkEnableOption { };
   };
 }
diff --git a/user/home.nix b/user/home.nix
index 98fc13a..5d280bc 100644
--- a/user/home.nix
+++ b/user/home.nix
@@ -16,6 +16,7 @@
     ./vscode
     ./fish
     ./firefox.nix
+    ./cosmic.nix
     ./alacritty.nix
     ./git.nix
     ./ssh.nix