diff --git a/changelog/20243.txt b/changelog/20243.txt
new file mode 100644
index 000000000..8d5b04420
--- /dev/null
+++ b/changelog/20243.txt
@@ -0,0 +1,4 @@
+```release-note:improvement
+cli/namespace: Add detailed flag to output additional namespace information 
+such as namespace IDs and custom metadata.
+```
diff --git a/command/namespace_list.go b/command/namespace_list.go
index 7dfd257e8..6394daedf 100644
--- a/command/namespace_list.go
+++ b/command/namespace_list.go
@@ -40,7 +40,18 @@ Usage: vault namespace list [options]
 }
 
 func (c *NamespaceListCommand) Flags() *FlagSets {
-	return c.flagSet(FlagSetHTTP | FlagSetOutputFormat)
+	set := c.flagSet(FlagSetHTTP | FlagSetOutputFormat)
+
+	f := set.NewFlagSet("Command Options")
+
+	f.BoolVar(&BoolVar{
+		Name:    "detailed",
+		Target:  &c.flagDetailed,
+		Default: false,
+		Usage:   "Print detailed information such as namespace ID.",
+	})
+
+	return set
 }
 
 func (c *NamespaceListCommand) AutocompleteArgs() complete.Predictor {
@@ -104,5 +115,9 @@ func (c *NamespaceListCommand) Run(args []string) int {
 		return 2
 	}
 
+	if c.flagDetailed && Format(c.UI) != "table" {
+		return OutputData(c.UI, secret.Data["key_info"])
+	}
+
 	return OutputList(c.UI, secret)
 }
diff --git a/website/content/docs/commands/namespace.mdx b/website/content/docs/commands/namespace.mdx
index 5913386a9..d52a3fa88 100644
--- a/website/content/docs/commands/namespace.mdx
+++ b/website/content/docs/commands/namespace.mdx
@@ -16,6 +16,12 @@ List all namespaces:
 $ vault namespace list
 ```
 
+List all namespaces with additional details such as namespace ID and custom metadata:
+
+```shell-session
+$ vault namespace list -detailed
+```
+
 Create a namespace at the path `ns1/` with no custom metadata:
 
 ```shell-session