diff --git a/homeassistant/components/proximity/diagnostics.py b/homeassistant/components/proximity/diagnostics.py
new file mode 100644
index 00000000000..ba5e1f53722
--- /dev/null
+++ b/homeassistant/components/proximity/diagnostics.py
@@ -0,0 +1,49 @@
+"""Diagnostics support for Proximity."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.components.device_tracker import ATTR_GPS, ATTR_IP, ATTR_MAC
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.components.person import ATTR_USER_ID
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import ATTR_LATITUDE, ATTR_LONGITUDE
+from homeassistant.core import HomeAssistant
+
+from .const import DOMAIN
+from .coordinator import ProximityDataUpdateCoordinator
+
+TO_REDACT = {
+    ATTR_GPS,
+    ATTR_IP,
+    ATTR_LATITUDE,
+    ATTR_LONGITUDE,
+    ATTR_MAC,
+    ATTR_USER_ID,
+    "context",
+}
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    coordinator: ProximityDataUpdateCoordinator = hass.data[DOMAIN][entry.entry_id]
+
+    diag_data = {
+        "entry": entry.as_dict(),
+    }
+
+    tracked_states: dict[str, dict] = {}
+    for tracked_entity_id in coordinator.tracked_entities:
+        if (state := hass.states.get(tracked_entity_id)) is None:
+            continue
+        tracked_states[tracked_entity_id] = state.as_dict()
+
+    diag_data["data"] = {
+        "proximity": coordinator.data.proximity,
+        "entities": coordinator.data.entities,
+        "entity_mapping": coordinator.entity_mapping,
+        "tracked_states": async_redact_data(tracked_states, TO_REDACT),
+    }
+    return diag_data
diff --git a/tests/components/proximity/snapshots/test_diagnostics.ambr b/tests/components/proximity/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..f8f7d9b014e
--- /dev/null
+++ b/tests/components/proximity/snapshots/test_diagnostics.ambr
@@ -0,0 +1,86 @@
+# serializer version: 1
+# name: test_entry_diagnostics
+  dict({
+    'data': dict({
+      'entities': dict({
+        'device_tracker.test1': dict({
+          'dir_of_travel': None,
+          'dist_to_zone': 2218752,
+          'is_in_ignored_zone': False,
+          'name': 'test1',
+        }),
+        'device_tracker.test2': dict({
+          'dir_of_travel': None,
+          'dist_to_zone': 4077309,
+          'is_in_ignored_zone': False,
+          'name': 'test2',
+        }),
+      }),
+      'entity_mapping': dict({
+        'device_tracker.test1': list([
+          'sensor.home_test1_distance',
+          'sensor.home_test1_direction_of_travel',
+        ]),
+        'device_tracker.test2': list([
+          'sensor.home_test2_distance',
+          'sensor.home_test2_direction_of_travel',
+        ]),
+        'device_tracker.test3': list([
+          'sensor.home_test3_distance',
+          'sensor.home_test3_direction_of_travel',
+        ]),
+      }),
+      'proximity': dict({
+        'dir_of_travel': 'unknown',
+        'dist_to_zone': 2219,
+        'nearest': 'test1',
+      }),
+      'tracked_states': dict({
+        'device_tracker.test1': dict({
+          'attributes': dict({
+            'friendly_name': 'test1',
+            'latitude': '**REDACTED**',
+            'longitude': '**REDACTED**',
+          }),
+          'context': '**REDACTED**',
+          'entity_id': 'device_tracker.test1',
+          'state': 'not_home',
+        }),
+        'device_tracker.test2': dict({
+          'attributes': dict({
+            'friendly_name': 'test2',
+            'latitude': '**REDACTED**',
+            'longitude': '**REDACTED**',
+          }),
+          'context': '**REDACTED**',
+          'entity_id': 'device_tracker.test2',
+          'state': 'not_home',
+        }),
+      }),
+    }),
+    'entry': dict({
+      'data': dict({
+        'ignored_zones': list([
+        ]),
+        'tolerance': 1,
+        'tracked_entities': list([
+          'device_tracker.test1',
+          'device_tracker.test2',
+          'device_tracker.test3',
+        ]),
+        'zone': 'zone.home',
+      }),
+      'disabled_by': None,
+      'domain': 'proximity',
+      'minor_version': 1,
+      'options': dict({
+      }),
+      'pref_disable_new_entities': False,
+      'pref_disable_polling': False,
+      'source': 'user',
+      'title': 'home',
+      'unique_id': 'proximity_home',
+      'version': 1,
+    }),
+  })
+# ---
diff --git a/tests/components/proximity/test_diagnostics.py b/tests/components/proximity/test_diagnostics.py
new file mode 100644
index 00000000000..35ecd152a06
--- /dev/null
+++ b/tests/components/proximity/test_diagnostics.py
@@ -0,0 +1,62 @@
+"""Tests for proximity diagnostics platform."""
+from __future__ import annotations
+
+from syrupy.assertion import SnapshotAssertion
+from syrupy.filters import props
+
+from homeassistant.components.proximity.const import (
+    CONF_IGNORED_ZONES,
+    CONF_TOLERANCE,
+    CONF_TRACKED_ENTITIES,
+    DOMAIN,
+)
+from homeassistant.config_entries import ConfigEntryState
+from homeassistant.const import CONF_ZONE
+from homeassistant.core import HomeAssistant
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+
+async def test_entry_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test config entry diagnostics."""
+    hass.states.async_set(
+        "device_tracker.test1",
+        "not_home",
+        {"friendly_name": "test1", "latitude": 20.1, "longitude": 10.1},
+    )
+    hass.states.async_set(
+        "device_tracker.test2",
+        "not_home",
+        {"friendly_name": "test2", "latitude": 150.1, "longitude": 20.1},
+    )
+
+    mock_entry = MockConfigEntry(
+        domain=DOMAIN,
+        title="home",
+        data={
+            CONF_ZONE: "zone.home",
+            CONF_TRACKED_ENTITIES: [
+                "device_tracker.test1",
+                "device_tracker.test2",
+                "device_tracker.test3",
+            ],
+            CONF_IGNORED_ZONES: [],
+            CONF_TOLERANCE: 1,
+        },
+        unique_id=f"{DOMAIN}_home",
+    )
+
+    mock_entry.add_to_hass(hass)
+    assert await hass.config_entries.async_setup(mock_entry.entry_id)
+    await hass.async_block_till_done()
+    assert mock_entry.state == ConfigEntryState.LOADED
+
+    assert await get_diagnostics_for_config_entry(
+        hass, hass_client, mock_entry
+    ) == snapshot(exclude=props("entry_id", "last_changed", "last_updated"))