diff --git a/homeassistant/components/playstation_network/icons.json b/homeassistant/components/playstation_network/icons.json
index a05170f78d3..7817a4c8b07 100644
--- a/homeassistant/components/playstation_network/icons.json
+++ b/homeassistant/components/playstation_network/icons.json
@@ -26,6 +26,9 @@
       },
       "online_id": {
         "default": "mdi:account"
+      },
+      "last_online": {
+        "default": "mdi:account-clock"
       }
     }
   }
diff --git a/homeassistant/components/playstation_network/sensor.py b/homeassistant/components/playstation_network/sensor.py
index b4563b00f25..6af305d3ce7 100644
--- a/homeassistant/components/playstation_network/sensor.py
+++ b/homeassistant/components/playstation_network/sensor.py
@@ -4,16 +4,22 @@ from __future__ import annotations
 
 from collections.abc import Callable
 from dataclasses import dataclass
+from datetime import datetime
 from enum import StrEnum
 from typing import TYPE_CHECKING
 
-from homeassistant.components.sensor import SensorEntity, SensorEntityDescription
+from homeassistant.components.sensor import (
+    SensorDeviceClass,
+    SensorEntity,
+    SensorEntityDescription,
+)
 from homeassistant.const import PERCENTAGE
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.device_registry import DeviceEntryType, DeviceInfo
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from homeassistant.helpers.typing import StateType
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.util import dt as dt_util
 
 from .const import DOMAIN
 from .coordinator import (
@@ -29,7 +35,7 @@ PARALLEL_UPDATES = 0
 class PlaystationNetworkSensorEntityDescription(SensorEntityDescription):
     """PlayStation Network sensor description."""
 
-    value_fn: Callable[[PlaystationNetworkData], StateType]
+    value_fn: Callable[[PlaystationNetworkData], StateType | datetime]
     entity_picture: str | None = None
 
 
@@ -43,6 +49,7 @@ class PlaystationNetworkSensor(StrEnum):
     EARNED_TROPHIES_SILVER = "earned_trophies_silver"
     EARNED_TROPHIES_BRONZE = "earned_trophies_bronze"
     ONLINE_ID = "online_id"
+    LAST_ONLINE = "last_online"
 
 
 SENSOR_DESCRIPTIONS: tuple[PlaystationNetworkSensorEntityDescription, ...] = (
@@ -102,6 +109,16 @@ SENSOR_DESCRIPTIONS: tuple[PlaystationNetworkSensorEntityDescription, ...] = (
         translation_key=PlaystationNetworkSensor.ONLINE_ID,
         value_fn=lambda psn: psn.username,
     ),
+    PlaystationNetworkSensorEntityDescription(
+        key=PlaystationNetworkSensor.LAST_ONLINE,
+        translation_key=PlaystationNetworkSensor.LAST_ONLINE,
+        value_fn=(
+            lambda psn: dt_util.parse_datetime(
+                psn.presence["basicPresence"]["lastAvailableDate"]
+            )
+        ),
+        device_class=SensorDeviceClass.TIMESTAMP,
+    ),
 )
 
 
@@ -147,7 +164,7 @@ class PlaystationNetworkSensorEntity(
         )
 
     @property
-    def native_value(self) -> StateType:
+    def native_value(self) -> StateType | datetime:
         """Return the state of the sensor."""
 
         return self.entity_description.value_fn(self.coordinator.data)
diff --git a/homeassistant/components/playstation_network/strings.json b/homeassistant/components/playstation_network/strings.json
index a26f45d8973..aee4dc0d737 100644
--- a/homeassistant/components/playstation_network/strings.json
+++ b/homeassistant/components/playstation_network/strings.json
@@ -78,6 +78,9 @@
       },
       "online_id": {
         "name": "Online-ID"
+      },
+      "last_online": {
+        "name": "Last online"
       }
     }
   }
diff --git a/tests/components/playstation_network/conftest.py b/tests/components/playstation_network/conftest.py
index 821025dbb9c..431a30ba7f7 100644
--- a/tests/components/playstation_network/conftest.py
+++ b/tests/components/playstation_network/conftest.py
@@ -64,6 +64,7 @@ def mock_user() -> Generator[MagicMock]:
                         "conceptIconUrl": "https://image.api.playstation.com/vulcan/ap/rnd/202211/2222/l8QTN7ThQK3lRBHhB3nX1s7h.png",
                     }
                 ],
+                "lastAvailableDate": "2025-06-30T01:42:15.391Z",
             }
         }
 
diff --git a/tests/components/playstation_network/snapshots/test_diagnostics.ambr b/tests/components/playstation_network/snapshots/test_diagnostics.ambr
index 405cee04559..6073b37863e 100644
--- a/tests/components/playstation_network/snapshots/test_diagnostics.ambr
+++ b/tests/components/playstation_network/snapshots/test_diagnostics.ambr
@@ -26,6 +26,7 @@
               'titleName': 'STAR WARS Jedi: Survivor™',
             }),
           ]),
+          'lastAvailableDate': '2025-06-30T01:42:15.391Z',
           'primaryPlatformInfo': dict({
             'onlineStatus': 'online',
             'platform': 'PS5',
diff --git a/tests/components/playstation_network/snapshots/test_sensor.ambr b/tests/components/playstation_network/snapshots/test_sensor.ambr
index 61030ee0a39..233791c05bd 100644
--- a/tests/components/playstation_network/snapshots/test_sensor.ambr
+++ b/tests/components/playstation_network/snapshots/test_sensor.ambr
@@ -97,6 +97,55 @@
     'state': '11754',
   })
 # ---
+# name: test_sensors[sensor.testuser_last_online-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': None,
+    'entity_id': 'sensor.testuser_last_online',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.TIMESTAMP: 'timestamp'>,
+    'original_icon': None,
+    'original_name': 'Last online',
+    'platform': 'playstation_network',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': <PlaystationNetworkSensor.LAST_ONLINE: 'last_online'>,
+    'unique_id': 'my-psn-id_last_online',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_sensors[sensor.testuser_last_online-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'timestamp',
+      'friendly_name': 'testuser Last online',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.testuser_last_online',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '2025-06-30T01:42:15+00:00',
+  })
+# ---
 # name: test_sensors[sensor.testuser_next_level-entry]
   EntityRegistryEntrySnapshot({
     'aliases': set({