diff --git a/homeassistant/components/onewire/config_flow.py b/homeassistant/components/onewire/config_flow.py
index 55b575e5f62..b5039d19b2d 100644
--- a/homeassistant/components/onewire/config_flow.py
+++ b/homeassistant/components/onewire/config_flow.py
@@ -62,8 +62,9 @@ class OneWireFlowHandler(ConfigFlow, domain=DOMAIN):
         """Handle 1-Wire config flow start."""
         errors: dict[str, str] = {}
         if user_input:
-            # Prevent duplicate entries (host+port)
-            self._async_abort_entries_match(user_input)
+            self._async_abort_entries_match(
+                {CONF_HOST: user_input[CONF_HOST], CONF_PORT: user_input[CONF_PORT]}
+            )
 
             await validate_input(self.hass, user_input, errors)
             if not errors:
@@ -77,6 +78,32 @@ class OneWireFlowHandler(ConfigFlow, domain=DOMAIN):
             errors=errors,
         )
 
+    async def async_step_reconfigure(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Handle 1-Wire reconfiguration."""
+        errors: dict[str, str] = {}
+        reconfigure_entry = self._get_reconfigure_entry()
+        if user_input:
+            self._async_abort_entries_match(
+                {CONF_HOST: user_input[CONF_HOST], CONF_PORT: user_input[CONF_PORT]}
+            )
+
+            await validate_input(self.hass, user_input, errors)
+            if not errors:
+                return self.async_update_reload_and_abort(
+                    reconfigure_entry, data_updates=user_input
+                )
+
+        return self.async_show_form(
+            step_id="reconfigure",
+            data_schema=self.add_suggested_values_to_schema(
+                DATA_SCHEMA, reconfigure_entry.data | (user_input or {})
+            ),
+            description_placeholders={"name": reconfigure_entry.title},
+            errors=errors,
+        )
+
     @staticmethod
     @callback
     def async_get_options_flow(
diff --git a/homeassistant/components/onewire/strings.json b/homeassistant/components/onewire/strings.json
index 68585c3203f..cd8615dc5aa 100644
--- a/homeassistant/components/onewire/strings.json
+++ b/homeassistant/components/onewire/strings.json
@@ -1,21 +1,34 @@
 {
   "config": {
     "abort": {
-      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]"
+      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
+      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]"
     },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     },
     "step": {
+      "reconfigure": {
+        "data": {
+          "host": "[%key:common::config_flow::data::host%]",
+          "port": "[%key:common::config_flow::data::port%]"
+        },
+        "data_description": {
+          "host": "[%key:component::onewire::config::step::user::data_description::host%]",
+          "port": "[%key:component::onewire::config::step::user::data_description::port%]"
+        },
+        "description": "Update OWServer configuration for {name}"
+      },
       "user": {
         "data": {
           "host": "[%key:common::config_flow::data::host%]",
           "port": "[%key:common::config_flow::data::port%]"
         },
         "data_description": {
-          "host": "The hostname or IP address of your 1-Wire device."
+          "host": "The hostname or IP address of your OWServer instance.",
+          "port": "The port of your OWServer instance (default is 4304)."
         },
-        "title": "Set server details"
+        "title": "Set OWServer instance details"
       }
     }
   },
diff --git a/tests/components/onewire/test_config_flow.py b/tests/components/onewire/test_config_flow.py
index 029e1278c86..cf61ab190db 100644
--- a/tests/components/onewire/test_config_flow.py
+++ b/tests/components/onewire/test_config_flow.py
@@ -17,6 +17,8 @@ from homeassistant.core import HomeAssistant
 from homeassistant.data_entry_flow import FlowResultType
 from homeassistant.helpers import device_registry as dr
 
+from tests.common import MockConfigEntry
+
 pytestmark = pytest.mark.usefixtures("mock_setup_entry")
 
 
@@ -102,6 +104,78 @@ async def test_user_duplicate(
     assert result["reason"] == "already_configured"
 
 
+async def test_reconfigure_flow(
+    hass: HomeAssistant, config_entry: MockConfigEntry, mock_setup_entry: AsyncMock
+) -> None:
+    """Test reconfigure flow."""
+    result = await config_entry.start_reconfigure_flow(hass)
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "reconfigure"
+    assert not result["errors"]
+
+    # Invalid server
+    with patch(
+        "homeassistant.components.onewire.onewirehub.protocol.proxy",
+        side_effect=protocol.ConnError,
+    ):
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            user_input={CONF_HOST: "2.3.4.5", CONF_PORT: 2345},
+        )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "reconfigure"
+    assert result["errors"] == {"base": "cannot_connect"}
+
+    # Valid server
+    with patch(
+        "homeassistant.components.onewire.onewirehub.protocol.proxy",
+    ):
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            user_input={CONF_HOST: "2.3.4.5", CONF_PORT: 2345},
+        )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reconfigure_successful"
+    assert config_entry.data == {CONF_HOST: "2.3.4.5", CONF_PORT: 2345}
+
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+async def test_reconfigure_duplicate(
+    hass: HomeAssistant, config_entry: MockConfigEntry, mock_setup_entry: AsyncMock
+) -> None:
+    """Test reconfigure duplicate flow."""
+    other_config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        source=SOURCE_USER,
+        data={
+            CONF_HOST: "2.3.4.5",
+            CONF_PORT: 2345,
+        },
+        entry_id="other",
+    )
+    other_config_entry.add_to_hass(hass)
+
+    result = await config_entry.start_reconfigure_flow(hass)
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "reconfigure"
+    assert not result["errors"]
+
+    # Duplicate server
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input={CONF_HOST: "2.3.4.5", CONF_PORT: 2345},
+    )
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "already_configured"
+
+    assert len(mock_setup_entry.mock_calls) == 0
+    assert config_entry.data == {CONF_HOST: "1.2.3.4", CONF_PORT: 1234}
+    assert other_config_entry.data == {CONF_HOST: "2.3.4.5", CONF_PORT: 2345}
+
+
 @pytest.mark.usefixtures("filled_device_registry")
 async def test_user_options_clear(
     hass: HomeAssistant, config_entry: ConfigEntry