diff --git a/esphome/components/template/alarm_control_panel/template_alarm_control_panel.h b/esphome/components/template/alarm_control_panel/template_alarm_control_panel.h
index 40a79004da..202dc7c13f 100644
--- a/esphome/components/template/alarm_control_panel/template_alarm_control_panel.h
+++ b/esphome/components/template/alarm_control_panel/template_alarm_control_panel.h
@@ -49,7 +49,7 @@ struct SensorInfo {
   uint8_t store_index;
 };
 
-class TemplateAlarmControlPanel : public alarm_control_panel::AlarmControlPanel, public Component {
+class TemplateAlarmControlPanel final : public alarm_control_panel::AlarmControlPanel, public Component {
  public:
   TemplateAlarmControlPanel();
   void dump_config() override;
diff --git a/esphome/components/template/binary_sensor/template_binary_sensor.h b/esphome/components/template/binary_sensor/template_binary_sensor.h
index bc591391b9..0af709b097 100644
--- a/esphome/components/template/binary_sensor/template_binary_sensor.h
+++ b/esphome/components/template/binary_sensor/template_binary_sensor.h
@@ -7,7 +7,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateBinarySensor : public Component, public binary_sensor::BinarySensor {
+class TemplateBinarySensor final : public Component, public binary_sensor::BinarySensor {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/button/template_button.h b/esphome/components/template/button/template_button.h
index 68e976f64b..5bda82c58f 100644
--- a/esphome/components/template/button/template_button.h
+++ b/esphome/components/template/button/template_button.h
@@ -5,7 +5,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateButton : public button::Button {
+class TemplateButton final : public button::Button {
  public:
   // Implements the abstract `press_action` but the `on_press` trigger already handles the press.
   void press_action() override{};
diff --git a/esphome/components/template/cover/template_cover.h b/esphome/components/template/cover/template_cover.h
index faff69f867..125c67bb86 100644
--- a/esphome/components/template/cover/template_cover.h
+++ b/esphome/components/template/cover/template_cover.h
@@ -14,7 +14,7 @@ enum TemplateCoverRestoreMode {
   COVER_RESTORE_AND_CALL,
 };
 
-class TemplateCover : public cover::Cover, public Component {
+class TemplateCover final : public cover::Cover, public Component {
  public:
   TemplateCover();
 
diff --git a/esphome/components/template/datetime/template_date.h b/esphome/components/template/datetime/template_date.h
index 7fed704d0e..fe64b0ba14 100644
--- a/esphome/components/template/datetime/template_date.h
+++ b/esphome/components/template/datetime/template_date.h
@@ -14,7 +14,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateDate : public datetime::DateEntity, public PollingComponent {
+class TemplateDate final : public datetime::DateEntity, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/datetime/template_datetime.h b/esphome/components/template/datetime/template_datetime.h
index ec45bf0326..c44bd85265 100644
--- a/esphome/components/template/datetime/template_datetime.h
+++ b/esphome/components/template/datetime/template_datetime.h
@@ -14,7 +14,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateDateTime : public datetime::DateTimeEntity, public PollingComponent {
+class TemplateDateTime final : public datetime::DateTimeEntity, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/datetime/template_time.h b/esphome/components/template/datetime/template_time.h
index ea7474c0ba..0c95330d27 100644
--- a/esphome/components/template/datetime/template_time.h
+++ b/esphome/components/template/datetime/template_time.h
@@ -14,7 +14,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateTime : public datetime::TimeEntity, public PollingComponent {
+class TemplateTime final : public datetime::TimeEntity, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/event/template_event.h b/esphome/components/template/event/template_event.h
index 251ae9299b..5467a64141 100644
--- a/esphome/components/template/event/template_event.h
+++ b/esphome/components/template/event/template_event.h
@@ -6,7 +6,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateEvent : public Component, public event::Event {};
+class TemplateEvent final : public Component, public event::Event {};
 
 }  // namespace template_
 }  // namespace esphome
diff --git a/esphome/components/template/fan/template_fan.h b/esphome/components/template/fan/template_fan.h
index b09352f4d4..052b385b93 100644
--- a/esphome/components/template/fan/template_fan.h
+++ b/esphome/components/template/fan/template_fan.h
@@ -6,7 +6,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateFan : public Component, public fan::Fan {
+class TemplateFan final : public Component, public fan::Fan {
  public:
   TemplateFan() {}
   void setup() override;
diff --git a/esphome/components/template/lock/template_lock.h b/esphome/components/template/lock/template_lock.h
index 14fca4635e..ac10794e4d 100644
--- a/esphome/components/template/lock/template_lock.h
+++ b/esphome/components/template/lock/template_lock.h
@@ -8,7 +8,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateLock : public lock::Lock, public Component {
+class TemplateLock final : public lock::Lock, public Component {
  public:
   TemplateLock();
 
diff --git a/esphome/components/template/number/template_number.h b/esphome/components/template/number/template_number.h
index a9307e9246..876ec96b3b 100644
--- a/esphome/components/template/number/template_number.h
+++ b/esphome/components/template/number/template_number.h
@@ -9,7 +9,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateNumber : public number::Number, public PollingComponent {
+class TemplateNumber final : public number::Number, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/output/template_output.h b/esphome/components/template/output/template_output.h
index 90de801a5c..9ecfc446b9 100644
--- a/esphome/components/template/output/template_output.h
+++ b/esphome/components/template/output/template_output.h
@@ -7,7 +7,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateBinaryOutput : public output::BinaryOutput {
+class TemplateBinaryOutput final : public output::BinaryOutput {
  public:
   Trigger<bool> *get_trigger() const { return trigger_; }
 
@@ -17,7 +17,7 @@ class TemplateBinaryOutput : public output::BinaryOutput {
   Trigger<bool> *trigger_ = new Trigger<bool>();
 };
 
-class TemplateFloatOutput : public output::FloatOutput {
+class TemplateFloatOutput final : public output::FloatOutput {
  public:
   Trigger<float> *get_trigger() const { return trigger_; }
 
diff --git a/esphome/components/template/select/template_select.h b/esphome/components/template/select/template_select.h
index 2dad059ade..cb5b546976 100644
--- a/esphome/components/template/select/template_select.h
+++ b/esphome/components/template/select/template_select.h
@@ -9,7 +9,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateSelect : public select::Select, public PollingComponent {
+class TemplateSelect final : public select::Select, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/sensor/template_sensor.h b/esphome/components/template/sensor/template_sensor.h
index 793d754a0f..3ca965dde3 100644
--- a/esphome/components/template/sensor/template_sensor.h
+++ b/esphome/components/template/sensor/template_sensor.h
@@ -7,7 +7,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateSensor : public sensor::Sensor, public PollingComponent {
+class TemplateSensor final : public sensor::Sensor, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/switch/template_switch.h b/esphome/components/template/switch/template_switch.h
index 18a374df35..35c18af448 100644
--- a/esphome/components/template/switch/template_switch.h
+++ b/esphome/components/template/switch/template_switch.h
@@ -8,7 +8,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateSwitch : public switch_::Switch, public Component {
+class TemplateSwitch final : public switch_::Switch, public Component {
  public:
   TemplateSwitch();
 
diff --git a/esphome/components/template/text/template_text.h b/esphome/components/template/text/template_text.h
index c12021f80e..1a0a66ed5b 100644
--- a/esphome/components/template/text/template_text.h
+++ b/esphome/components/template/text/template_text.h
@@ -60,7 +60,7 @@ template<uint8_t SZ> class TextSaver : public TemplateTextSaverBase {
   }
 };
 
-class TemplateText : public text::Text, public PollingComponent {
+class TemplateText final : public text::Text, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/text_sensor/template_text_sensor.h b/esphome/components/template/text_sensor/template_text_sensor.h
index 0d01c72023..da5c518c7f 100644
--- a/esphome/components/template/text_sensor/template_text_sensor.h
+++ b/esphome/components/template/text_sensor/template_text_sensor.h
@@ -8,7 +8,7 @@
 namespace esphome {
 namespace template_ {
 
-class TemplateTextSensor : public text_sensor::TextSensor, public PollingComponent {
+class TemplateTextSensor final : public text_sensor::TextSensor, public PollingComponent {
  public:
   template<typename F> void set_template(F &&f) { this->f_.set(std::forward<F>(f)); }
 
diff --git a/esphome/components/template/valve/template_valve.h b/esphome/components/template/valve/template_valve.h
index d6235f8e5c..c452648193 100644
--- a/esphome/components/template/valve/template_valve.h
+++ b/esphome/components/template/valve/template_valve.h
@@ -14,7 +14,7 @@ enum TemplateValveRestoreMode {
   VALVE_RESTORE_AND_CALL,
 };
 
-class TemplateValve : public valve::Valve, public Component {
+class TemplateValve final : public valve::Valve, public Component {
  public:
   TemplateValve();