diff --git a/artifacts/api-server/src/routes/protocol.ts b/artifacts/api-server/src/routes/protocol.ts
index 7e077651..d70bf6d3 100644
--- a/artifacts/api-server/src/routes/protocol.ts
+++ b/artifacts/api-server/src/routes/protocol.ts
@@ -161,6 +161,7 @@ const bookingCreateSchema = z
     roomId: z.number().int().positive(),
     title: z.string().trim().min(1).max(500),
     requesterName: z.string().trim().max(300).nullable().optional(),
+    attendeeCount: z.number().int().positive().max(100000).nullable().optional(),
     startsAt: isoDateTime,
     endsAt: isoDateTime,
     notes: z.string().trim().max(5000).nullable().optional(),
@@ -175,6 +176,7 @@ const bookingPatchSchema = z
     roomId: z.number().int().positive().optional(),
     title: z.string().trim().min(1).max(500).optional(),
     requesterName: z.string().trim().max(300).nullable().optional(),
+    attendeeCount: z.number().int().positive().max(100000).nullable().optional(),
     startsAt: isoDateTime.optional(),
     endsAt: isoDateTime.optional(),
     notes: z.string().trim().max(5000).nullable().optional(),
@@ -191,6 +193,7 @@ const publicBookingRequestSchema = z
     requesterName: z.string().trim().min(1).max(300),
     requesterPhone: z.string().trim().min(3).max(40),
     requesterOrg: z.string().trim().max(300).nullable().optional(),
+    attendeeCount: z.number().int().positive().max(100000).nullable().optional(),
     startsAt: isoDateTime,
     endsAt: isoDateTime,
     notes: z.string().trim().max(5000).nullable().optional(),
@@ -458,6 +461,7 @@ router.post(
             requesterName: body.requesterName,
             requesterPhone: body.requesterPhone,
             requesterOrg: body.requesterOrg ?? null,
+            attendeeCount: body.attendeeCount ?? null,
             startsAt,
             endsAt,
             status: "pending",
@@ -687,6 +691,7 @@ router.post(
             roomId: body.roomId,
             title: body.title,
             requesterName: body.requesterName ?? null,
+            attendeeCount: body.attendeeCount ?? null,
             startsAt,
             endsAt,
             status: canApprove ? "approved" : "pending",
@@ -773,6 +778,9 @@ router.patch(
             ...(body.requesterName !== undefined
               ? { requesterName: body.requesterName }
               : {}),
+            ...(body.attendeeCount !== undefined
+              ? { attendeeCount: body.attendeeCount }
+              : {}),
             startsAt,
             endsAt,
             ...(body.notes !== undefined ? { notes: body.notes } : {}),
diff --git a/artifacts/tx-os/src/locales/ar.json b/artifacts/tx-os/src/locales/ar.json
index a8850c39..34907262 100644
--- a/artifacts/tx-os/src/locales/ar.json
+++ b/artifacts/tx-os/src/locales/ar.json
@@ -1714,6 +1714,7 @@
       "requester": "مقدّم الطلب",
       "org": "الجهة",
       "phone": "الهاتف",
+      "attendeeCount": "عدد الحضور",
       "publicRequest": "طلب عام",
       "roomLabel": "القاعة",
       "titleLabel": "عنوان الحجز",
diff --git a/artifacts/tx-os/src/locales/en.json b/artifacts/tx-os/src/locales/en.json
index 9d19c8fd..fa7af018 100644
--- a/artifacts/tx-os/src/locales/en.json
+++ b/artifacts/tx-os/src/locales/en.json
@@ -1587,6 +1587,7 @@
       "requester": "Requester",
       "org": "Organization",
       "phone": "Phone",
+      "attendeeCount": "Attendees",
       "publicRequest": "Public request",
       "roomLabel": "Room",
       "titleLabel": "Booking title",
diff --git a/artifacts/tx-os/src/pages/protocol-request.tsx b/artifacts/tx-os/src/pages/protocol-request.tsx
index af477b52..e52ba837 100644
--- a/artifacts/tx-os/src/pages/protocol-request.tsx
+++ b/artifacts/tx-os/src/pages/protocol-request.tsx
@@ -22,6 +22,7 @@ type FormState = {
   title: string;
   requesterPhone: string;
   requesterOrg: string;
+  attendeeCount: string;
   roomId: string;
   startsAt: string;
   endsAt: string;
@@ -34,6 +35,7 @@ const EMPTY: FormState = {
   title: "",
   requesterPhone: "",
   requesterOrg: "",
+  attendeeCount: "",
   roomId: "",
   startsAt: "",
   endsAt: "",
@@ -105,6 +107,10 @@ export default function ProtocolRequestPage() {
           requesterName: form.requesterName.trim(),
           requesterPhone: form.requesterPhone.trim(),
           requesterOrg: form.requesterOrg.trim() || null,
+          attendeeCount:
+            form.attendeeCount.trim() === ""
+              ? null
+              : Number(form.attendeeCount),
           startsAt: localToIso(form.startsAt),
           endsAt: localToIso(form.endsAt),
           notes: form.notes.trim() || null,
@@ -249,6 +255,19 @@ export default function ProtocolRequestPage() {
             />
           </div>
 
+          <div className="space-y-2">
+            <Label htmlFor="attendeeCount">عدد الحضور</Label>
+            <Input
+              id="attendeeCount"
+              type="number"
+              inputMode="numeric"
+              min={1}
+              value={form.attendeeCount}
+              onChange={(e) => set("attendeeCount", e.target.value)}
+              placeholder="العدد المتوقع للحضور (اختياري)"
+            />
+          </div>
+
           <div className="space-y-2">
             <Label htmlFor="room">
               القاعة <span className="text-rose-500">*</span>
diff --git a/artifacts/tx-os/src/pages/protocol.tsx b/artifacts/tx-os/src/pages/protocol.tsx
index dfd7e4d6..ef1bb440 100644
--- a/artifacts/tx-os/src/pages/protocol.tsx
+++ b/artifacts/tx-os/src/pages/protocol.tsx
@@ -86,6 +86,7 @@ type Booking = {
   requesterName: string | null;
   requesterPhone: string | null;
   requesterOrg: string | null;
+  attendeeCount: number | null;
   source: "internal" | "public";
   startsAt: string;
   endsAt: string;
@@ -497,6 +498,11 @@ export default function ProtocolPage() {
               <span dir="ltr">{b.requesterPhone}</span>
             </div>
           )}
+          {b.attendeeCount != null && (
+            <div className="text-xs text-slate-400">
+              {t("protocol.bookings.attendeeCount")}: {b.attendeeCount}
+            </div>
+          )}
         </div>
         <div className="flex flex-col items-end gap-1 shrink-0">
           {b.source === "public" && (
diff --git a/lib/db/src/schema/protocol.ts b/lib/db/src/schema/protocol.ts
index c2156a5d..d90d484b 100644
--- a/lib/db/src/schema/protocol.ts
+++ b/lib/db/src/schema/protocol.ts
@@ -94,6 +94,9 @@ export const protocolRoomBookingsTable = pgTable(
     // The requester's organization / entity (الجهة). Optional even for
     // public requests; always null for internal bookings unless set.
     requesterOrg: varchar("requester_org", { length: 300 }),
+    // Expected number of attendees (عدد الحضور). Optional; supplied by the
+    // guest on a public request or by staff on an internal booking.
+    attendeeCount: integer("attendee_count"),
     // Provenance marker. "internal" for bookings created by authenticated
     // protocol staff through the app; "public" for guest requests coming in
     // via the no-login booking-request link. Defaults to "internal" so all