diff --git a/esphome/core/entity_base.cpp b/esphome/core/entity_base.cpp
index 4883c72cf1..046f99d8cc 100644
--- a/esphome/core/entity_base.cpp
+++ b/esphome/core/entity_base.cpp
@@ -74,6 +74,12 @@ void EntityBase::set_object_id(const char *object_id) {
   this->calc_object_id_();
 }
 
+void EntityBase::set_name_and_object_id(const char *name, const char *object_id) {
+  this->set_name(name);
+  this->object_id_c_str_ = object_id;
+  this->calc_object_id_();
+}
+
 // Calculate Object ID Hash from Entity Name
 void EntityBase::calc_object_id_() {
   this->object_id_hash_ =
diff --git a/esphome/core/entity_base.h b/esphome/core/entity_base.h
index 2b52d66f76..aa9b92877a 100644
--- a/esphome/core/entity_base.h
+++ b/esphome/core/entity_base.h
@@ -41,6 +41,9 @@ class EntityBase {
   std::string get_object_id() const;
   void set_object_id(const char *object_id);
 
+  // Set both name and object_id in one call (reduces generated code size)
+  void set_name_and_object_id(const char *name, const char *object_id);
+
   // Get the unique Object ID of this Entity
   uint32_t get_object_id_hash();
 
diff --git a/esphome/core/entity_helpers.py b/esphome/core/entity_helpers.py
index 9b4786f835..f360b4d809 100644
--- a/esphome/core/entity_helpers.py
+++ b/esphome/core/entity_helpers.py
@@ -84,8 +84,6 @@ async def setup_entity(var: MockObj, config: ConfigType, platform: str) -> None:
         # Get device name for object ID calculation
         device_name = device_id_obj.id
 
-    add(var.set_name(config[CONF_NAME]))
-
     # Calculate base object_id using the same logic as C++
     # This must match the C++ behavior in esphome/core/entity_base.cpp
     base_object_id = get_base_entity_object_id(
@@ -97,8 +95,8 @@ async def setup_entity(var: MockObj, config: ConfigType, platform: str) -> None:
             "Entity has empty name, using '%s' as object_id base", base_object_id
         )
 
-    # Set the object ID
-    add(var.set_object_id(base_object_id))
+    # Set both name and object_id in one call to reduce generated code size
+    add(var.set_name_and_object_id(config[CONF_NAME], base_object_id))
     _LOGGER.debug(
         "Setting object_id '%s' for entity '%s' on platform '%s'",
         base_object_id,
diff --git a/tests/component_tests/binary_sensor/test_binary_sensor.py b/tests/component_tests/binary_sensor/test_binary_sensor.py
index 32d74027ba..86e0705023 100644
--- a/tests/component_tests/binary_sensor/test_binary_sensor.py
+++ b/tests/component_tests/binary_sensor/test_binary_sensor.py
@@ -29,7 +29,7 @@ def test_binary_sensor_sets_mandatory_fields(generate_main):
     )
 
     # Then
-    assert 'bs_1->set_name("test bs1");' in main_cpp
+    assert 'bs_1->set_name_and_object_id("test bs1", "test_bs1");' in main_cpp
     assert "bs_1->set_pin(" in main_cpp
 
 
diff --git a/tests/component_tests/button/test_button.py b/tests/component_tests/button/test_button.py
index 512ef42b44..b21665288c 100644
--- a/tests/component_tests/button/test_button.py
+++ b/tests/component_tests/button/test_button.py
@@ -26,7 +26,7 @@ def test_button_sets_mandatory_fields(generate_main):
     main_cpp = generate_main("tests/component_tests/button/test_button.yaml")
 
     # Then
-    assert 'wol_1->set_name("wol_test_1");' in main_cpp
+    assert 'wol_1->set_name_and_object_id("wol_test_1", "wol_test_1");' in main_cpp
     assert "wol_2->set_macaddr(18, 52, 86, 120, 144, 171);" in main_cpp
 
 
diff --git a/tests/component_tests/text/test_text.py b/tests/component_tests/text/test_text.py
index 99ddd78ee7..bfc3131f6d 100644
--- a/tests/component_tests/text/test_text.py
+++ b/tests/component_tests/text/test_text.py
@@ -25,7 +25,7 @@ def test_text_sets_mandatory_fields(generate_main):
     main_cpp = generate_main("tests/component_tests/text/test_text.yaml")
 
     # Then
-    assert 'it_1->set_name("test 1 text");' in main_cpp
+    assert 'it_1->set_name_and_object_id("test 1 text", "test_1_text");' in main_cpp
 
 
 def test_text_config_value_internal_set(generate_main):
diff --git a/tests/component_tests/text_sensor/test_text_sensor.py b/tests/component_tests/text_sensor/test_text_sensor.py
index 1c4ef6633d..934ee67cef 100644
--- a/tests/component_tests/text_sensor/test_text_sensor.py
+++ b/tests/component_tests/text_sensor/test_text_sensor.py
@@ -25,9 +25,18 @@ def test_text_sensor_sets_mandatory_fields(generate_main):
     main_cpp = generate_main("tests/component_tests/text_sensor/test_text_sensor.yaml")
 
     # Then
-    assert 'ts_1->set_name("Template Text Sensor 1");' in main_cpp
-    assert 'ts_2->set_name("Template Text Sensor 2");' in main_cpp
-    assert 'ts_3->set_name("Template Text Sensor 3");' in main_cpp
+    assert (
+        'ts_1->set_name_and_object_id("Template Text Sensor 1", "template_text_sensor_1");'
+        in main_cpp
+    )
+    assert (
+        'ts_2->set_name_and_object_id("Template Text Sensor 2", "template_text_sensor_2");'
+        in main_cpp
+    )
+    assert (
+        'ts_3->set_name_and_object_id("Template Text Sensor 3", "template_text_sensor_3");'
+        in main_cpp
+    )
 
 
 def test_text_sensor_config_value_internal_set(generate_main):
diff --git a/tests/unit_tests/core/test_entity_helpers.py b/tests/unit_tests/core/test_entity_helpers.py
index 9ba5367413..01de0f27f9 100644
--- a/tests/unit_tests/core/test_entity_helpers.py
+++ b/tests/unit_tests/core/test_entity_helpers.py
@@ -27,8 +27,13 @@ from esphome.helpers import sanitize, snake_case
 
 from .common import load_config_from_fixture
 
-# Pre-compiled regex pattern for extracting object IDs from expressions
+# Pre-compiled regex patterns for extracting object IDs from expressions
+# Matches both old format: .set_object_id("obj_id")
+# and new format: .set_name_and_object_id("name", "obj_id")
 OBJECT_ID_PATTERN = re.compile(r'\.set_object_id\(["\'](.*?)["\']\)')
+COMBINED_PATTERN = re.compile(
+    r'\.set_name_and_object_id\(["\'].*?["\']\s*,\s*["\'](.*?)["\']\)'
+)
 
 FIXTURES_DIR = Path(__file__).parent.parent / "fixtures" / "core" / "entity_helpers"
 
@@ -273,8 +278,10 @@ def setup_test_environment() -> Generator[list[str], None, None]:
 def extract_object_id_from_expressions(expressions: list[str]) -> str | None:
     """Extract the object ID that was set from the generated expressions."""
     for expr in expressions:
-        # Look for set_object_id calls with regex to handle various formats
-        # Matches: var.set_object_id("temperature_2") or var.set_object_id('temperature_2')
+        # First try new combined format: .set_name_and_object_id("name", "obj_id")
+        if match := COMBINED_PATTERN.search(expr):
+            return match.group(1)
+        # Fall back to old format: .set_object_id("obj_id")
         if match := OBJECT_ID_PATTERN.search(expr):
             return match.group(1)
     return None