diff --git a/homeassistant/components/conversation/default_agent.py b/homeassistant/components/conversation/default_agent.py
index 7bb2c2182b3..71b14f8d299 100644
--- a/homeassistant/components/conversation/default_agent.py
+++ b/homeassistant/components/conversation/default_agent.py
@@ -419,6 +419,7 @@ class DefaultAgent(ConversationEntity):
         language: str,
     ) -> RecognizeResult | None:
         """Search intents for a match to user input."""
+        custom_result: RecognizeResult | None = None
         name_result: RecognizeResult | None = None
         best_results: list[RecognizeResult] = []
         best_text_chunks_matched: int | None = None
@@ -429,6 +430,20 @@ class DefaultAgent(ConversationEntity):
             intent_context=intent_context,
             language=language,
         ):
+            # User intents have highest priority
+            if (result.intent_metadata is not None) and result.intent_metadata.get(
+                METADATA_CUSTOM_SENTENCE
+            ):
+                if (custom_result is None) or (
+                    result.text_chunks_matched > custom_result.text_chunks_matched
+                ):
+                    custom_result = result
+
+                # Clear builtin results
+                best_results = []
+                name_result = None
+                continue
+
             # Prioritize results with a "name" slot, but still prefer ones with
             # more literal text matched.
             if (
@@ -453,6 +468,10 @@ class DefaultAgent(ConversationEntity):
                 # We will resolve the ambiguity below.
                 best_results.append(result)
 
+        if custom_result is not None:
+            # Prioritize user intents
+            return custom_result
+
         if name_result is not None:
             # Prioritize matches with entity names above area names
             return name_result
@@ -718,11 +737,22 @@ class DefaultAgent(ConversationEntity):
             if self._config_intents and (
                 self.hass.config.language in (language, language_variant)
             ):
+                hass_config_path = self.hass.config.path()
                 merge_dict(
                     intents_dict,
                     {
                         "intents": {
-                            intent_name: {"data": [{"sentences": sentences}]}
+                            intent_name: {
+                                "data": [
+                                    {
+                                        "sentences": sentences,
+                                        "metadata": {
+                                            METADATA_CUSTOM_SENTENCE: True,
+                                            METADATA_CUSTOM_FILE: hass_config_path,
+                                        },
+                                    }
+                                ]
+                            }
                             for intent_name, sentences in self._config_intents.items()
                         }
                     },
diff --git a/tests/components/conversation/test_init.py b/tests/components/conversation/test_init.py
index 48f227e9497..dc940dba81b 100644
--- a/tests/components/conversation/test_init.py
+++ b/tests/components/conversation/test_init.py
@@ -1,12 +1,15 @@
 """The tests for the Conversation component."""
 
 from http import HTTPStatus
+import os
+import tempfile
 from typing import Any
 from unittest.mock import patch
 
 import pytest
 from syrupy.assertion import SnapshotAssertion
 import voluptuous as vol
+import yaml
 
 from homeassistant.components import conversation
 from homeassistant.components.conversation import default_agent
@@ -1389,3 +1392,103 @@ async def test_ws_hass_agent_debug_sentence_trigger(
 
     # Trigger should not have been executed
     assert len(calls) == 0
+
+
+async def test_custom_sentences_priority(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    hass_admin_user: MockUser,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test that user intents from custom_sentences have priority over builtin intents/sentences."""
+    with tempfile.NamedTemporaryFile(
+        mode="w+",
+        encoding="utf-8",
+        suffix=".yaml",
+        dir=os.path.join(hass.config.config_dir, "custom_sentences", "en"),
+    ) as custom_sentences_file:
+        # Add a custom sentence that would match a builtin sentence.
+        # Custom sentences have priority.
+        yaml.dump(
+            {
+                "language": "en",
+                "intents": {
+                    "CustomIntent": {"data": [{"sentences": ["turn on the lamp"]}]}
+                },
+            },
+            custom_sentences_file,
+        )
+        custom_sentences_file.flush()
+        custom_sentences_file.seek(0)
+
+        assert await async_setup_component(hass, "homeassistant", {})
+        assert await async_setup_component(hass, "conversation", {})
+        assert await async_setup_component(hass, "light", {})
+        assert await async_setup_component(hass, "intent", {})
+        assert await async_setup_component(
+            hass,
+            "intent_script",
+            {
+                "intent_script": {
+                    "CustomIntent": {"speech": {"text": "custom response"}}
+                }
+            },
+        )
+
+        # Ensure that a "lamp" exists so that we can verify the custom intent
+        # overrides the builtin sentence.
+        hass.states.async_set("light.lamp", "off")
+
+        client = await hass_client()
+        resp = await client.post(
+            "/api/conversation/process",
+            json={
+                "text": "turn on the lamp",
+                "language": hass.config.language,
+            },
+        )
+        assert resp.status == HTTPStatus.OK
+        data = await resp.json()
+        assert data["response"]["response_type"] == "action_done"
+        assert data["response"]["speech"]["plain"]["speech"] == "custom response"
+
+
+async def test_config_sentences_priority(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    hass_admin_user: MockUser,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test that user intents from configuration.yaml have priority over builtin intents/sentences."""
+    # Add a custom sentence that would match a builtin sentence.
+    # Custom sentences have priority.
+    assert await async_setup_component(hass, "homeassistant", {})
+    assert await async_setup_component(hass, "intent", {})
+    assert await async_setup_component(
+        hass,
+        "conversation",
+        {"conversation": {"intents": {"CustomIntent": ["turn on the lamp"]}}},
+    )
+    assert await async_setup_component(hass, "light", {})
+    assert await async_setup_component(
+        hass,
+        "intent_script",
+        {"intent_script": {"CustomIntent": {"speech": {"text": "custom response"}}}},
+    )
+
+    # Ensure that a "lamp" exists so that we can verify the custom intent
+    # overrides the builtin sentence.
+    hass.states.async_set("light.lamp", "off")
+
+    client = await hass_client()
+    resp = await client.post(
+        "/api/conversation/process",
+        json={
+            "text": "turn on the lamp",
+            "language": hass.config.language,
+        },
+    )
+    assert resp.status == HTTPStatus.OK
+    data = await resp.json()
+    assert data["response"]["response_type"] == "action_done"
+    assert data["response"]["speech"]["plain"]["speech"] == "custom response"