diff --git a/esphome/components/api/api.proto b/esphome/components/api/api.proto
index f6eb8ec1c9..e115e4630d 100644
--- a/esphome/components/api/api.proto
+++ b/esphome/components/api/api.proto
@@ -2147,7 +2147,7 @@ message ListEntitiesEventResponse {
   EntityCategory entity_category = 7;
   string device_class = 8;
 
-  repeated string event_types = 9 [(container_pointer_no_template) = "std::vector<const char *>"];
+  repeated string event_types = 9 [(container_pointer_no_template) = "FixedVector<const char *>"];
   uint32 device_id = 10 [(field_ifdef) = "USE_DEVICES"];
 }
 message EventResponse {
diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 7f8438af25..8c293b41a2 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -1310,8 +1310,7 @@ uint16_t APIConnection::try_send_event_info(EntityBase *entity, APIConnection *c
   auto *event = static_cast<event::Event *>(entity);
   ListEntitiesEventResponse msg;
   msg.set_device_class(event->get_device_class_ref());
-  for (const char *event_type : event->get_event_types())
-    msg.event_types->push_back(event_type);
+  msg.event_types = &event->get_event_types();
   return fill_and_encode_entity_info(event, msg, ListEntitiesEventResponse::MESSAGE_TYPE, conn, remaining_size,
                                      is_single);
 }
diff --git a/esphome/components/api/api_pb2.h b/esphome/components/api/api_pb2.h
index df793eb262..358049026e 100644
--- a/esphome/components/api/api_pb2.h
+++ b/esphome/components/api/api_pb2.h
@@ -2788,7 +2788,7 @@ class ListEntitiesEventResponse final : public InfoResponseProtoMessage {
 #endif
   StringRef device_class_ref_{};
   void set_device_class(const StringRef &ref) { this->device_class_ref_ = ref; }
-  const std::vector<const char *> *event_types{};
+  const FixedVector<const char *> *event_types{};
   void encode(ProtoWriteBuffer buffer) const override;
   void calculate_size(ProtoSize &size) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
diff --git a/esphome/components/event/event.cpp b/esphome/components/event/event.cpp
index 6b79fa8c11..a14afbd7f5 100644
--- a/esphome/components/event/event.cpp
+++ b/esphome/components/event/event.cpp
@@ -25,6 +25,22 @@ void Event::trigger(const std::string &event_type) {
   this->event_callback_.call(event_type);
 }
 
+void Event::set_event_types(const FixedVector<const char *> &event_types) {
+  this->types_.init(event_types.size());
+  for (const char *type : event_types) {
+    this->types_.push_back(type);
+  }
+  this->last_event_type_ = nullptr;  // Reset when types change
+}
+
+void Event::set_event_types(const std::vector<const char *> &event_types) {
+  this->types_.init(event_types.size());
+  for (const char *type : event_types) {
+    this->types_.push_back(type);
+  }
+  this->last_event_type_ = nullptr;  // Reset when types change
+}
+
 void Event::add_on_event_callback(std::function<void(const std::string &event_type)> &&callback) {
   this->event_callback_.add(std::move(callback));
 }
diff --git a/esphome/components/event/event.h b/esphome/components/event/event.h
index efa4c14464..e4b2e0b845 100644
--- a/esphome/components/event/event.h
+++ b/esphome/components/event/event.h
@@ -31,18 +31,18 @@ class Event : public EntityBase, public EntityBase_DeviceClass {
     this->types_ = event_types;
     this->last_event_type_ = nullptr;  // Reset when types change
   }
+  /// Set the event types supported by this event (from FixedVector).
+  void set_event_types(const FixedVector<const char *> &event_types);
   /// Set the event types supported by this event (from vector).
-  void set_event_types(const std::vector<const char *> &event_types) {
-    this->types_ = event_types;
-    this->last_event_type_ = nullptr;  // Reset when types change
-  }
+  void set_event_types(const std::vector<const char *> &event_types);
 
   // Deleted overloads to catch incorrect std::string usage at compile time with clear error messages
   void set_event_types(std::initializer_list<std::string> event_types) = delete;
+  void set_event_types(const FixedVector<std::string> &event_types) = delete;
   void set_event_types(const std::vector<std::string> &event_types) = delete;
 
   /// Return the event types supported by this event.
-  const std::vector<const char *> &get_event_types() const { return this->types_; }
+  const FixedVector<const char *> &get_event_types() const { return this->types_; }
 
   /// Return the last triggered event type (pointer to string in types_), or nullptr if no event triggered yet.
   const char *get_last_event_type() const { return this->last_event_type_; }
@@ -51,7 +51,7 @@ class Event : public EntityBase, public EntityBase_DeviceClass {
 
  protected:
   CallbackManager<void(const std::string &event_type)> event_callback_;
-  std::vector<const char *> types_;
+  FixedVector<const char *> types_;
 
  private:
   /// Last triggered event type - must point to entry in types_ to ensure valid lifetime.