diff --git a/CHANGELOG.md b/CHANGELOG.md
index a07d4ea..09d67af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,4 +4,6 @@
 - Updated Terror ID database for new and modified terrors.
 	* These changes won't be reflected on the Discord Rich presence for now.
 - Updated 繁體中文 localization (ty @XoF-eLtTiL).
+- New OSC parameter: ToN_PlayerCount
+	* This parameter indicates the lobby size, not the participating players or alive.
 - Removed YoBro
\ No newline at end of file
diff --git a/Docs/OSC/OSC_Parameters.md b/Docs/OSC/OSC_Parameters.md
index 809dc77..c846127 100644
--- a/Docs/OSC/OSC_Parameters.md
+++ b/Docs/OSC/OSC_Parameters.md
@@ -19,6 +19,11 @@ Parameter        | Type    | Description
 `ToN_Damaged`    | `INT`<br>`FLOAT`   | Value set for a few frames when the player takes damage. The number represents the amount of damage taken on that hit. If the player dies the base damage number will be `255`
 `ToN_DeathID`    | `INT`   | You can use this parameter to track when your friends die in the game.
 
+# Other
+Parameter        | Type    | Description
+-----------------|---------|--------------------------
+`ToN_PlayerCount`| `INT`   | Number of players in the lobby.
+
 ### ToN_Damaged
 > You can customize the output value for the `ToN_Damaged` parameter using [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript).<br>
 > Just click on **Settings > Send Damage Event > (Set Output)** and here you can specify the code that will be evaluated before sending the damage value as a float.
diff --git a/Utils/LilOSC.cs b/Utils/LilOSC.cs
index 49f705e..f464d1b 100644
--- a/Utils/LilOSC.cs
+++ b/Utils/LilOSC.cs
@@ -200,12 +200,15 @@ internal static class LilOSC {
         const string ParamItemStatus = "ToN_ItemStatus";
         const string ParamMaster = "ToN_MasterChange";
 
+        const string ParamPlayerCount = "ToN_PlayerCount";
+
         static readonly string[] ParamAll = [
             ParamRoundType, ParamTerror1, ParamTerror2, ParamTerror3, ParamTPhase1, ParamTPhase2, ParamTPhase3,
             ParamOptedIn, ParamSaboteur, ParamMap, ParamEncounter,
             ParamTerrorColorH, ParamTerrorColorS, ParamTerrorColorV, ParamTerrorColorL,
             ParamTerrorColorR, ParamTerrorColorG, ParamTerrorColorB,
-            ParamAlive, ParamReborn, ParamDamaged, ParamMaster, ParamDeath, ParamPages, ParamItemStatus
+            ParamAlive, ParamReborn, ParamDamaged, ParamMaster, ParamDeath, ParamPages, ParamItemStatus,
+            ParamPlayerCount
         ];
         const string ParameterFileName = "osc_parameters.txt";
         internal static void Initialize() {
@@ -237,6 +240,8 @@ internal static void Initialize() {
 
         static int LastPageCount = 0;
 
+        static int LastPlayerCount = 0;
+
         static string[]? m_EncounterKeys { get; set; }
         static string[] EncounterKeys {
             get {
@@ -267,6 +272,8 @@ static string[] EncounterKeys {
         static bool IsRoundActive => ToNGameState.IsRoundActive;
         static bool IsReborn => ToNGameState.IsReborn;
 
+        static int PlayerCount => ToNGameState.PlayerCount;
+
         static string ChatboxMessage = string.Empty;
         static bool ChatboxClear = false;
 
@@ -535,6 +542,8 @@ internal static void SendData(bool force = false) {
                 if (LastAlive != IsAlive || force) SendParam(ParamAlive, LastAlive = IsAlive);
                 if (LastReborn != IsReborn || force) SendParam(ParamReborn, LastReborn = IsReborn);
                 if (LastStarted != IsRoundActive || force) SendParam(ParamStarted, LastStarted = IsRoundActive);
+
+                if (LastPlayerCount != PlayerCount || force) SendParam(ParamPlayerCount, LastPlayerCount = PlayerCount);
             }
 
             if (ChatboxClear || (ToNLogContext.CanSendChatbox && MainWindow.Started && !force && !string.IsNullOrEmpty(ChatboxMessage))) {