diff --git a/soc/arm/st_stm32/stm32wba/Kconfig.defconfig.stm32wba55xx b/soc/arm/st_stm32/stm32wba/Kconfig.defconfig.stm32wba55xx
new file mode 100644
index 00000000000..ca745f87471
--- /dev/null
+++ b/soc/arm/st_stm32/stm32wba/Kconfig.defconfig.stm32wba55xx
@@ -0,0 +1,14 @@
+# ST Microelectronics STM32WBA55XX MCU
+
+# Copyright (c) 2023 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_STM32WBA55XX
+
+config SOC
+	default "stm32wba55xx"
+
+config NUM_IRQS
+	default 70
+
+endif # SOC_STM32WBA55XX
diff --git a/soc/arm/st_stm32/stm32wba/Kconfig.soc b/soc/arm/st_stm32/stm32wba/Kconfig.soc
index 6e8586d8f3d..75f48454b1c 100644
--- a/soc/arm/st_stm32/stm32wba/Kconfig.soc
+++ b/soc/arm/st_stm32/stm32wba/Kconfig.soc
@@ -10,4 +10,7 @@ depends on SOC_SERIES_STM32WBAX
 config SOC_STM32WBA52XX
 	bool "STM32WBA52XX"
 
+config SOC_STM32WBA55XX
+	bool "STM32WBA55XX"
+
 endchoice