diff --git a/Cmdr/BuiltInCommands/Admin/ban.lua b/Cmdr/BuiltInCommands/Admin/ban.lua
new file mode 100644
index 00000000..a6204a6b
--- /dev/null
+++ b/Cmdr/BuiltInCommands/Admin/ban.lua
@@ -0,0 +1,22 @@
+return {
+	Name = "ban";
+	Description = "Bans a player or set of players.";
+	Group = "DefaultAdmin";
+	Args = {
+		{
+			Type = "playerIds";
+			Name = "players";
+			Description = "The players to ban.";
+		},
+		{
+			Type = "duration";
+			Name = "duration";
+			Description = "How long the ban should last. A negative value means a permanent ban.";
+		},
+		{
+			Type = "string";
+			Name = "reason";
+			Description = "The reason for the ban. This is shown to the player(s) and saved in history.";
+		},
+	};
+}
diff --git a/Cmdr/BuiltInCommands/Admin/banServer.lua b/Cmdr/BuiltInCommands/Admin/banServer.lua
new file mode 100644
index 00000000..3d5befa4
--- /dev/null
+++ b/Cmdr/BuiltInCommands/Admin/banServer.lua
@@ -0,0 +1,18 @@
+local Players = game:GetService("Players")
+
+return function (_, players, duration, reason)
+	if duration <= 0 then
+		duration = -1
+	end
+
+	Players:BanAsync({
+		UserIds = players,
+		Duration = duration,
+		DisplayReason = reason,
+		PrivateReason = reason,
+		ExcludeAltAccounts = false,
+		ApplyToUniverse = true,
+	})
+
+	return ("Banned %d players."):format(#players)
+end
diff --git a/Cmdr/BuiltInCommands/Admin/unban.lua b/Cmdr/BuiltInCommands/Admin/unban.lua
new file mode 100644
index 00000000..e2e247a5
--- /dev/null
+++ b/Cmdr/BuiltInCommands/Admin/unban.lua
@@ -0,0 +1,12 @@
+return {
+	Name = "unban";
+	Description = "Unbans a player or set of players.";
+	Group = "DefaultAdmin";
+	Args = {
+		{
+			Type = "playerIds";
+			Name = "players";
+			Description = "The players to unban.";
+		},
+	};
+}
diff --git a/Cmdr/BuiltInCommands/Admin/unbanServer.lua b/Cmdr/BuiltInCommands/Admin/unbanServer.lua
new file mode 100644
index 00000000..c7e79236
--- /dev/null
+++ b/Cmdr/BuiltInCommands/Admin/unbanServer.lua
@@ -0,0 +1,10 @@
+local Players = game:GetService("Players")
+
+return function (_, players)
+	Players:UnbanAsync({
+		UserIds = players,
+		ApplyToUniverse = true,
+	})
+
+	return ("Unbanned %d players."):format(#players)
+end