diff --git a/boards/st/nucleo_g431kb/doc/index.rst b/boards/st/nucleo_g431kb/doc/index.rst
index 3ea55476583b752..cb90e460df56cc3 100644
--- a/boards/st/nucleo_g431kb/doc/index.rst
+++ b/boards/st/nucleo_g431kb/doc/index.rst
@@ -53,6 +53,8 @@ The Zephyr nucleo_g431kb board configuration supports the following hardware fea
 +-----------+------------+-------------------------------------+
 | PWM       | on-chip    | pwm                                 |
 +-----------+------------+-------------------------------------+
+| I2C       | on-chip    | i2c                                 |
++-----------+------------+-------------------------------------+
 
 Other hardware features are not yet supported on this Zephyr port.
 
@@ -77,6 +79,8 @@ Default Zephyr Peripheral Mapping:
 - LPUART_1_RX : PA3
 - LD2 : PB8
 - PWM_4_CH_3 : PB8
+- I2C_2_SCL : PA9
+- I2C_2_SDA : PA8
 
 System Clock
 ------------
diff --git a/boards/st/nucleo_g431kb/nucleo_g431kb.dts b/boards/st/nucleo_g431kb/nucleo_g431kb.dts
index 4f1a5d971b0d268..8211acc1876c3af 100644
--- a/boards/st/nucleo_g431kb/nucleo_g431kb.dts
+++ b/boards/st/nucleo_g431kb/nucleo_g431kb.dts
@@ -90,6 +90,11 @@
 	};
 };
 
+&i2c2 {
+	pinctrl-0 = <&i2c2_scl_pa9 &i2c2_sda_pa8>;
+	pinctrl-names = "default";
+	status = "okay";
+};
 
 &flash0 {