diff --git a/homeassistant/components/rest/binary_sensor.py b/homeassistant/components/rest/binary_sensor.py
index bc51433c3c5..fc40d76a21d 100644
--- a/homeassistant/components/rest/binary_sensor.py
+++ b/homeassistant/components/rest/binary_sensor.py
@@ -100,24 +100,17 @@ class RestBinarySensor(RestEntity, TemplateEntity, BinarySensorEntity):
             fallback_name=DEFAULT_BINARY_SENSOR_NAME,
             unique_id=unique_id,
         )
-        self._state = False
         self._previous_data = None
         self._value_template = config.get(CONF_VALUE_TEMPLATE)
         if (value_template := self._value_template) is not None:
             value_template.hass = hass
-        self._is_on = None
 
         self._attr_device_class = config.get(CONF_DEVICE_CLASS)
 
-    @property
-    def is_on(self):
-        """Return true if the binary sensor is on."""
-        return self._is_on
-
     def _update_from_rest_data(self):
         """Update state from the rest data."""
         if self.rest.data is None:
-            self._is_on = False
+            self._attr_is_on = False
 
         response = self.rest.data
 
@@ -127,8 +120,11 @@ class RestBinarySensor(RestEntity, TemplateEntity, BinarySensorEntity):
             )
 
         try:
-            self._is_on = bool(int(response))
+            self._attr_is_on = bool(int(response))
         except ValueError:
-            self._is_on = {"true": True, "on": True, "open": True, "yes": True}.get(
-                response.lower(), False
-            )
+            self._attr_is_on = {
+                "true": True,
+                "on": True,
+                "open": True,
+                "yes": True,
+            }.get(response.lower(), False)
diff --git a/homeassistant/components/rest/switch.py b/homeassistant/components/rest/switch.py
index f2a5d93cd22..7e470674b1e 100644
--- a/homeassistant/components/rest/switch.py
+++ b/homeassistant/components/rest/switch.py
@@ -119,8 +119,6 @@ class RestSwitch(TemplateEntity, SwitchEntity):
             unique_id=unique_id,
         )
 
-        self._state = None
-
         auth = None
         if username := config.get(CONF_USERNAME):
             auth = aiohttp.BasicAuth(username, password=config[CONF_PASSWORD])
@@ -149,11 +147,6 @@ class RestSwitch(TemplateEntity, SwitchEntity):
         template.attach(hass, self._headers)
         template.attach(hass, self._params)
 
-    @property
-    def is_on(self):
-        """Return true if device is on."""
-        return self._state
-
     async def async_turn_on(self, **kwargs: Any) -> None:
         """Turn the device on."""
         body_on_t = self._body_on.async_render(parse_result=False)
@@ -162,7 +155,7 @@ class RestSwitch(TemplateEntity, SwitchEntity):
             req = await self.set_device_state(body_on_t)
 
             if req.status == HTTPStatus.OK:
-                self._state = True
+                self._attr_is_on = True
             else:
                 _LOGGER.error(
                     "Can't turn on %s. Is resource/endpoint offline?", self._resource
@@ -177,7 +170,7 @@ class RestSwitch(TemplateEntity, SwitchEntity):
         try:
             req = await self.set_device_state(body_off_t)
             if req.status == HTTPStatus.OK:
-                self._state = False
+                self._attr_is_on = False
             else:
                 _LOGGER.error(
                     "Can't turn off %s. Is resource/endpoint offline?", self._resource
@@ -233,17 +226,17 @@ class RestSwitch(TemplateEntity, SwitchEntity):
             )
             text = text.lower()
             if text == "true":
-                self._state = True
+                self._attr_is_on = True
             elif text == "false":
-                self._state = False
+                self._attr_is_on = False
             else:
-                self._state = None
+                self._attr_is_on = None
         else:
             if text == self._body_on.template:
-                self._state = True
+                self._attr_is_on = True
             elif text == self._body_off.template:
-                self._state = False
+                self._attr_is_on = False
             else:
-                self._state = None
+                self._attr_is_on = None
 
         return req