diff --git a/esphome/core/config.py b/esphome/core/config.py
index f3d8b7e715..d27ec1d6bf 100644
--- a/esphome/core/config.py
+++ b/esphome/core/config.py
@@ -340,6 +340,15 @@ async def _add_automations(config):
         await automation.build_automation(trigger, [], conf)
 
 
+def fnv1a_32bit_hash(string: str) -> int:
+    """FNV-1a 32-bit hash function."""
+    hash_value = 2166136261
+    for char in string:
+        hash_value ^= ord(char)
+        hash_value = (hash_value * 16777619) & 0xFFFFFFFF
+    return hash_value
+
+
 @coroutine_with_priority(100.0)
 async def to_code(config):
     cg.add_global(cg.global_ns.namespace("esphome").using)
@@ -420,7 +429,7 @@ async def to_code(config):
     if config[CONF_SUB_DEVICES]:
         for dev_conf in config[CONF_SUB_DEVICES]:
             dev = cg.new_Pvariable(dev_conf[CONF_ID])
-            cg.add(dev.set_uid(hash(str(dev_conf[CONF_ID])) % 0xFFFFFFFF))
+            cg.add(dev.set_uid(fnv1a_32bit_hash(str(dev_conf[CONF_ID]))))
             cg.add(dev.set_name(dev_conf[CONF_NAME]))
             cg.add(dev.set_area(dev_conf[CONF_AREA]))
             cg.add(cg.App.register_sub_device(dev))
diff --git a/esphome/cpp_helpers.py b/esphome/cpp_helpers.py
index f63d9fcb54..7a8ad060e4 100644
--- a/esphome/cpp_helpers.py
+++ b/esphome/cpp_helpers.py
@@ -13,7 +13,7 @@ from esphome.const import (
     CONF_UPDATE_INTERVAL,
     KEY_PAST_SAFE_MODE,
 )
-from esphome.core import CORE, ID, coroutine
+from esphome.core import CORE, ID, coroutine, fnv1a_32bit_hash
 from esphome.coroutine import FakeAwaitable
 from esphome.cpp_generator import add, get_variable
 from esphome.cpp_types import App
@@ -113,7 +113,7 @@ async def setup_entity(var, config):
         add(var.set_entity_category(config[CONF_ENTITY_CATEGORY]))
     if CONF_DEVICE_ID in config:
         device = await get_variable(config[CONF_DEVICE_ID])
-        add(var.set_device_uid(hash(str(device)) % 0xFFFFFFFF))
+        add(var.set_device_uid(fnv1a_32bit_hash(str(device))))
 
 
 def extract_registry_entry_config(