diff --git a/soc/st/stm32/Kconfig b/soc/st/stm32/Kconfig
index 4f3371ab79b..59a245fb17a 100644
--- a/soc/st/stm32/Kconfig
+++ b/soc/st/stm32/Kconfig
@@ -60,7 +60,7 @@ choice POWER_SUPPLY_CHOICE
 	prompt "STM32 power supply configuration"
 	default POWER_SUPPLY_LDO
 	depends on SOC_SERIES_STM32H7X || SOC_SERIES_STM32H7RSX || \
-		SOC_SERIES_STM32U5X || SOC_STM32WBA55XX
+		SOC_SERIES_STM32U5X || SOC_STM32WBA55XX || SOC_STM32WBA65XX
 
 config POWER_SUPPLY_LDO
 	bool "LDO supply"
diff --git a/soc/st/stm32/soc.yml b/soc/st/stm32/soc.yml
index 7999b323ebe..2467265470a 100644
--- a/soc/st/stm32/soc.yml
+++ b/soc/st/stm32/soc.yml
@@ -221,6 +221,7 @@ family:
     socs:
     - name: stm32wba52xx
     - name: stm32wba55xx
+    - name: stm32wba65xx
   - name: stm32wlx
     socs:
     - name: stm32wle4xx
diff --git a/soc/st/stm32/stm32wbax/Kconfig.defconfig.stm32wba65xx b/soc/st/stm32/stm32wbax/Kconfig.defconfig.stm32wba65xx
new file mode 100644
index 00000000000..bd811b035ef
--- /dev/null
+++ b/soc/st/stm32/stm32wbax/Kconfig.defconfig.stm32wba65xx
@@ -0,0 +1,11 @@
+# ST Microelectronics STM32WBA65XX MCU
+
+# Copyright (c) 2025 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_STM32WBA65XX
+
+config NUM_IRQS
+	default 82
+
+endif # SOC_STM32WBA65XX
diff --git a/soc/st/stm32/stm32wbax/Kconfig.soc b/soc/st/stm32/stm32wbax/Kconfig.soc
index 104a3923989..cee2f81308f 100644
--- a/soc/st/stm32/stm32wbax/Kconfig.soc
+++ b/soc/st/stm32/stm32wbax/Kconfig.soc
@@ -18,6 +18,11 @@ config SOC_STM32WBA55XX
 	bool
 	select SOC_SERIES_STM32WBAX
 
+config SOC_STM32WBA65XX
+	bool
+	select SOC_SERIES_STM32WBAX
+
 config SOC
 	default "stm32wba52xx" if SOC_STM32WBA52XX
 	default "stm32wba55xx" if SOC_STM32WBA55XX
+	default "stm32wba65xx" if SOC_STM32WBA65XX