diff --git a/esphome/components/select/automation.h b/esphome/components/select/automation.h
index 3e42eaf98a..768f2621f7 100644
--- a/esphome/components/select/automation.h
+++ b/esphome/components/select/automation.h
@@ -4,8 +4,7 @@
 #include "esphome/core/component.h"
 #include "select.h"
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 class SelectStateTrigger : public Trigger<std::string, size_t> {
  public:
@@ -63,5 +62,4 @@ template<typename... Ts> class SelectOperationAction : public Action<Ts...> {
   Select *select_;
 };
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select
diff --git a/esphome/components/select/select.cpp b/esphome/components/select/select.cpp
index 9fe7a52422..3ec413f167 100644
--- a/esphome/components/select/select.cpp
+++ b/esphome/components/select/select.cpp
@@ -4,8 +4,7 @@
 #include "esphome/core/log.h"
 #include <cstring>
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 static const char *const TAG = "select";
 
@@ -86,5 +85,4 @@ optional<std::string> Select::at(size_t index) const {
 
 const char *Select::option_at(size_t index) const { return traits.get_options().at(index); }
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select
diff --git a/esphome/components/select/select.h b/esphome/components/select/select.h
index f72bdfb675..fe0fe9b7fd 100644
--- a/esphome/components/select/select.h
+++ b/esphome/components/select/select.h
@@ -6,8 +6,7 @@
 #include "select_call.h"
 #include "select_traits.h"
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 #define LOG_SELECT(prefix, type, obj) \
   if ((obj) != nullptr) { \
@@ -112,5 +111,4 @@ class Select : public EntityBase {
   CallbackManager<void(std::string, size_t)> state_callback_;
 };
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select
diff --git a/esphome/components/select/select_call.cpp b/esphome/components/select/select_call.cpp
index aa7559e24e..aecfed0d64 100644
--- a/esphome/components/select/select_call.cpp
+++ b/esphome/components/select/select_call.cpp
@@ -2,8 +2,7 @@
 #include "select.h"
 #include "esphome/core/log.h"
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 static const char *const TAG = "select";
 
@@ -125,5 +124,4 @@ void SelectCall::perform() {
   parent->control(idx);
 }
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select
diff --git a/esphome/components/select/select_call.h b/esphome/components/select/select_call.h
index eae7d3de1d..b31d890ef6 100644
--- a/esphome/components/select/select_call.h
+++ b/esphome/components/select/select_call.h
@@ -2,8 +2,7 @@
 
 #include "esphome/core/helpers.h"
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 class Select;
 
@@ -45,5 +44,4 @@ class SelectCall {
   bool cycle_;
 };
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select
diff --git a/esphome/components/select/select_traits.cpp b/esphome/components/select/select_traits.cpp
index e5e12bdc7a..ff52c0d85b 100644
--- a/esphome/components/select/select_traits.cpp
+++ b/esphome/components/select/select_traits.cpp
@@ -1,7 +1,6 @@
 #include "select_traits.h"
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 void SelectTraits::set_options(const std::initializer_list<const char *> &options) { this->options_ = options; }
 
@@ -14,5 +13,4 @@ void SelectTraits::set_options(const FixedVector<const char *> &options) {
 
 const FixedVector<const char *> &SelectTraits::get_options() const { return this->options_; }
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select
diff --git a/esphome/components/select/select_traits.h b/esphome/components/select/select_traits.h
index ee59a030ad..78a83e5944 100644
--- a/esphome/components/select/select_traits.h
+++ b/esphome/components/select/select_traits.h
@@ -3,8 +3,7 @@
 #include "esphome/core/helpers.h"
 #include <initializer_list>
 
-namespace esphome {
-namespace select {
+namespace esphome::select {
 
 class SelectTraits {
  public:
@@ -16,5 +15,4 @@ class SelectTraits {
   FixedVector<const char *> options_;
 };
 
-}  // namespace select
-}  // namespace esphome
+}  // namespace esphome::select