diff --git a/esphome/components/uart/uart_component.h b/esphome/components/uart/uart_component.h
index b34ff4a8ec..7dd8e094fd 100644
--- a/esphome/components/uart/uart_component.h
+++ b/esphome/components/uart/uart_component.h
@@ -84,7 +84,7 @@ class UARTComponent {
 
   // Sets the size of the TX buffer.
   // @param tx_buffer_size Size of the TX buffer in bytes.
-  void set_tx_buffer_size(size_t tx_buffer_size) { this->tx_buffer_size_ = tx_buffer_size; }  
+  void set_tx_buffer_size(size_t tx_buffer_size) { this->tx_buffer_size_ = tx_buffer_size; }
   
   // Sets the size of the RX buffer.
   // @param rx_buffer_size Size of the RX buffer in bytes.
@@ -92,7 +92,7 @@ class UARTComponent {
 
   // Gets the size of the TX buffer.
   // @return Size of the TX buffer in bytes.
-  size_t get_tx_buffer_size() { return this->tx_buffer_size_; }  
+  size_t get_tx_buffer_size() { return this->tx_buffer_size_; }
   
   // Gets the size of the RX buffer.
   // @return Size of the RX buffer in bytes.
diff --git a/esphome/components/uart/uart_component_esp8266.cpp b/esphome/components/uart/uart_component_esp8266.cpp
index d96888bc1e..fa8dc3fb17 100644
--- a/esphome/components/uart/uart_component_esp8266.cpp
+++ b/esphome/components/uart/uart_component_esp8266.cpp
@@ -72,7 +72,6 @@ void ESP8266UartComponent::setup() {
   ) {
     this->hw_serial_ = &Serial;
     this->hw_serial_->begin(this->baud_rate_, config);
-    this->hw_serial_->setTxBufferSize(this->tx_buffer_size_);
     this->hw_serial_->setRxBufferSize(this->rx_buffer_size_);
     ESP8266UartComponent::serial0_in_use = true;
   } else if (!ESP8266UartComponent::serial0_in_use && (tx_pin_ == nullptr || tx_pin_->get_pin() == 15) &&
@@ -85,14 +84,12 @@ void ESP8266UartComponent::setup() {
   ) {
     this->hw_serial_ = &Serial;
     this->hw_serial_->begin(this->baud_rate_, config);
-    this->hw_serial_->setTxBufferSize(this->tx_buffer_size_);
     this->hw_serial_->setRxBufferSize(this->rx_buffer_size_);
     this->hw_serial_->swap();
     ESP8266UartComponent::serial0_in_use = true;
   } else if ((tx_pin_ == nullptr || tx_pin_->get_pin() == 2) && (rx_pin_ == nullptr || rx_pin_->get_pin() == 8)) {
     this->hw_serial_ = &Serial1;
     this->hw_serial_->begin(this->baud_rate_, config);
-    this->hw_serial_->setTxBufferSize(this->tx_buffer_size_);
     this->hw_serial_->setRxBufferSize(this->rx_buffer_size_);
   } else {
     this->sw_serial_ = new ESP8266SoftwareSerial();  // NOLINT
@@ -106,7 +103,6 @@ void ESP8266UartComponent::load_settings(bool dump_config) {
   if (this->hw_serial_ != nullptr) {
     SerialConfig config = static_cast<SerialConfig>(get_config());
     this->hw_serial_->begin(this->baud_rate_, config);
-    this->hw_serial_->setTxBufferSize(this->tx_buffer_size_);
     this->hw_serial_->setRxBufferSize(this->rx_buffer_size_);
   } else {
     this->sw_serial_->setup(this->tx_pin_, this->rx_pin_, this->baud_rate_, this->stop_bits_, this->data_bits_,
@@ -122,9 +118,6 @@ void ESP8266UartComponent::dump_config() {
   ESP_LOGCONFIG(TAG, "UART Bus:");
   LOG_PIN("  TX Pin: ", this->tx_pin_);
   LOG_PIN("  RX Pin: ", this->rx_pin_);
-  if (this->tx_pin_ != nullptr) {
-    ESP_LOGCONFIG(TAG, "  TX Buffer Size: %u", this->tx_buffer_size_);  // NOLINT
-  }
   if (this->rx_pin_ != nullptr) {
     ESP_LOGCONFIG(TAG, "  RX Buffer Size: %u", this->rx_buffer_size_);  // NOLINT
   }