diff --git a/.changelog/17138.txt b/.changelog/17138.txt
new file mode 100644
index 000000000..456e254d5
--- /dev/null
+++ b/.changelog/17138.txt
@@ -0,0 +1,3 @@
+```release-note:improvement
+cli: Add leader status to output of `nomad server members -json`
+```
diff --git a/command/server_members.go b/command/server_members.go
index 88db710f2..3badbc5b4 100644
--- a/command/server_members.go
+++ b/command/server_members.go
@@ -118,7 +118,13 @@ func (c *ServerMembersCommand) Run(args []string) int {
 	// Sort the members
 	sort.Sort(api.AgentMembersNameSort(srvMembers.Members))
 
+	// Determine the leaders per region.
+	leaders, leaderErr := regionLeaders(client, srvMembers.Members)
+
 	if json || len(tmpl) > 0 {
+		for _, member := range srvMembers.Members {
+			member.Tags["Leader"] = fmt.Sprintf("%t", isLeader(member, leaders))
+		}
 		out, err := Format(json, tmpl, srvMembers.Members)
 		if err != nil {
 			c.Ui.Error(err.Error())
@@ -129,9 +135,6 @@ func (c *ServerMembersCommand) Run(args []string) int {
 		return 0
 	}
 
-	// Determine the leaders per region.
-	leaders, leaderErr := regionLeaders(client, srvMembers.Members)
-
 	// Format the list
 	var out []string
 	if verbose {