diff --git a/README.md b/README.md
index 8fb021f..577f180 100644
--- a/README.md
+++ b/README.md
@@ -912,6 +912,7 @@ extensions = {'quickfix'}
 - symbols-outline
 - toggleterm
 - trouble
+- mason
 
 #### Custom extensions
 
diff --git a/lua/lualine/extensions/mason.lua b/lua/lualine/extensions/mason.lua
new file mode 100644
index 0000000..16ed56b
--- /dev/null
+++ b/lua/lualine/extensions/mason.lua
@@ -0,0 +1,25 @@
+-- lualine extension for mason.nvim
+
+local ok, mason_registry = pcall(require, 'mason-registry')
+if not ok then
+  return ''
+end
+
+local M = {}
+
+M.sections = {
+  lualine_a = {
+    function()
+      return 'Mason'
+    end,
+  },
+  lualine_b = {
+    function()
+      return 'Installed: ' .. #mason_registry.get_installed_packages() .. '/' .. #mason_registry.get_all_package_specs()
+    end,
+  },
+}
+
+M.filetypes = { 'mason' }
+
+return M