diff --git a/soc/arm/st_stm32/stm32f0/Kconfig.defconfig.stm32f042x6 b/soc/arm/st_stm32/stm32f0/Kconfig.defconfig.stm32f042x6
new file mode 100644
index 00000000000..fe4a08966b5
--- /dev/null
+++ b/soc/arm/st_stm32/stm32f0/Kconfig.defconfig.stm32f042x6
@@ -0,0 +1,14 @@
+# ST Microelectronics STM32F042X6 MCU
+
+# Copyright (c) 2023 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_STM32F042X6
+
+config SOC
+	default "stm32f042x6"
+
+config NUM_IRQS
+	default 32
+
+endif # SOC_STM32F042X6
diff --git a/soc/arm/st_stm32/stm32f0/Kconfig.soc b/soc/arm/st_stm32/stm32f0/Kconfig.soc
index 59d93afb899..728ea4a10c3 100644
--- a/soc/arm/st_stm32/stm32f0/Kconfig.soc
+++ b/soc/arm/st_stm32/stm32f0/Kconfig.soc
@@ -22,6 +22,9 @@ config SOC_STM32F030XC
 config SOC_STM32F031X6
 	bool "STM32F031X6"
 
+config SOC_STM32F042X6
+	bool "STM32F042X6"
+
 config SOC_STM32F051X8
 	bool "STM32F051X8"