diff --git a/homeassistant/components/mqtt/__init__.py b/homeassistant/components/mqtt/__init__.py
index 02a98f6ce90..f723d8da3ca 100644
--- a/homeassistant/components/mqtt/__init__.py
+++ b/homeassistant/components/mqtt/__init__.py
@@ -191,6 +191,7 @@ MQTT_WILL_BIRTH_SCHEMA = vol.Schema(
 PLATFORM_CONFIG_SCHEMA_BASE = vol.Schema(
     {
         vol.Optional(Platform.ALARM_CONTROL_PANEL.value): cv.ensure_list,
+        vol.Optional(Platform.BINARY_SENSOR.value): cv.ensure_list,
         vol.Optional(Platform.BUTTON.value): cv.ensure_list,
         vol.Optional(Platform.FAN.value): cv.ensure_list,
         vol.Optional(Platform.LIGHT.value): cv.ensure_list,
diff --git a/homeassistant/components/mqtt/binary_sensor.py b/homeassistant/components/mqtt/binary_sensor.py
index 5d0da99d786..b9ab190cc9b 100644
--- a/homeassistant/components/mqtt/binary_sensor.py
+++ b/homeassistant/components/mqtt/binary_sensor.py
@@ -1,6 +1,7 @@
 """Support for MQTT binary sensors."""
 from __future__ import annotations
 
+import asyncio
 from datetime import timedelta
 import functools
 import logging
@@ -41,8 +42,10 @@ from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
     MqttAvailability,
     MqttEntity,
+    async_get_platform_config_from_yaml,
     async_setup_entry_helper,
     async_setup_platform_helper,
+    warn_for_legacy_schema,
 )
 
 _LOGGER = logging.getLogger(__name__)
@@ -54,7 +57,7 @@ DEFAULT_PAYLOAD_ON = "ON"
 DEFAULT_FORCE_UPDATE = False
 CONF_EXPIRE_AFTER = "expire_after"
 
-PLATFORM_SCHEMA = mqtt.MQTT_RO_PLATFORM_SCHEMA.extend(
+PLATFORM_SCHEMA_MODERN = mqtt.MQTT_RO_SCHEMA.extend(
     {
         vol.Optional(CONF_DEVICE_CLASS): DEVICE_CLASSES_SCHEMA,
         vol.Optional(CONF_EXPIRE_AFTER): cv.positive_int,
@@ -66,7 +69,13 @@ PLATFORM_SCHEMA = mqtt.MQTT_RO_PLATFORM_SCHEMA.extend(
     }
 ).extend(MQTT_ENTITY_COMMON_SCHEMA.schema)
 
-DISCOVERY_SCHEMA = PLATFORM_SCHEMA.extend({}, extra=vol.REMOVE_EXTRA)
+# Configuring MQTT Binary sensors under the binary_sensor platform key is deprecated in HA Core 2022.6
+PLATFORM_SCHEMA = vol.All(
+    cv.PLATFORM_SCHEMA.extend(PLATFORM_SCHEMA_MODERN.schema),
+    warn_for_legacy_schema(binary_sensor.DOMAIN),
+)
+
+DISCOVERY_SCHEMA = PLATFORM_SCHEMA_MODERN.extend({}, extra=vol.REMOVE_EXTRA)
 
 
 async def async_setup_platform(
@@ -75,7 +84,8 @@ async def async_setup_platform(
     async_add_entities: AddEntitiesCallback,
     discovery_info: DiscoveryInfoType | None = None,
 ) -> None:
-    """Set up MQTT binary sensor through configuration.yaml."""
+    """Set up MQTT binary sensor configured under the fan platform key (deprecated)."""
+    # Deprecated in HA Core 2022.6
     await async_setup_platform_helper(
         hass, binary_sensor.DOMAIN, config, async_add_entities, _async_setup_entity
     )
@@ -86,7 +96,17 @@ async def async_setup_entry(
     config_entry: ConfigEntry,
     async_add_entities: AddEntitiesCallback,
 ) -> None:
-    """Set up MQTT binary sensor dynamically through MQTT discovery."""
+    """Set up MQTT binary sensor through configuration.yaml and dynamically through MQTT discovery."""
+    # load and initialize platform config from configuration.yaml
+    await asyncio.gather(
+        *(
+            _async_setup_entity(hass, async_add_entities, config, config_entry)
+            for config in await async_get_platform_config_from_yaml(
+                hass, binary_sensor.DOMAIN, PLATFORM_SCHEMA_MODERN
+            )
+        )
+    )
+    # setup for discovery
     setup = functools.partial(
         _async_setup_entity, hass, async_add_entities, config_entry=config_entry
     )
diff --git a/tests/components/mqtt/test_binary_sensor.py b/tests/components/mqtt/test_binary_sensor.py
index 5055550be7c..e4a48b07940 100644
--- a/tests/components/mqtt/test_binary_sensor.py
+++ b/tests/components/mqtt/test_binary_sensor.py
@@ -41,6 +41,7 @@ from .test_common import (
     help_test_reloadable_late,
     help_test_setting_attribute_via_mqtt_json_message,
     help_test_setting_attribute_with_template,
+    help_test_setup_manual_entity_from_yaml,
     help_test_unique_id,
     help_test_update_with_json_attrs_bad_JSON,
     help_test_update_with_json_attrs_not_dict,
@@ -973,3 +974,15 @@ async def test_skip_restoring_state_with_over_due_expire_trigger(
         assert await async_setup_component(hass, domain, {domain: config3})
         await hass.async_block_till_done()
     assert "Skip state recovery after reload for binary_sensor.test3" in caplog.text
+
+
+async def test_setup_manual_entity_from_yaml(hass, caplog, tmp_path):
+    """Test setup manual configured MQTT entity."""
+    platform = binary_sensor.DOMAIN
+    config = copy.deepcopy(DEFAULT_CONFIG[platform])
+    config["name"] = "test"
+    del config["platform"]
+    await help_test_setup_manual_entity_from_yaml(
+        hass, caplog, tmp_path, platform, config
+    )
+    assert hass.states.get(f"{platform}.test") is not None