diff --git a/boards/arm/nucleo_wb55rg/CMakeLists.txt b/boards/arm/nucleo_wb55rg/CMakeLists.txt
new file mode 100644
index 00000000000..a700f3c235d
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/CMakeLists.txt
@@ -0,0 +1,3 @@
+zephyr_library()
+zephyr_library_sources(pinmux.c)
+zephyr_library_include_directories(${PROJECT_SOURCE_DIR}/drivers)
diff --git a/boards/arm/nucleo_wb55rg/Kconfig.board b/boards/arm/nucleo_wb55rg/Kconfig.board
new file mode 100644
index 00000000000..016d5e96bcc
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/Kconfig.board
@@ -0,0 +1,10 @@
+# Kconfig - STM32WB55RG Nucleo board configuration
+#
+# Copyright (c) 2019 Linaro Limited
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config BOARD_NUCLEO_WB55RG
+	bool "Nucleo WB55RG Development Board"
+	depends on SOC_STM32WB55XG
diff --git a/boards/arm/nucleo_wb55rg/Kconfig.defconfig b/boards/arm/nucleo_wb55rg/Kconfig.defconfig
new file mode 100644
index 00000000000..d2548f9448f
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/Kconfig.defconfig
@@ -0,0 +1,27 @@
+# Kconfig - STM32LWB55RG Nucleo board configuration
+#
+# Copyright (c) 2019 Linaro Limited
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+if BOARD_NUCLEO_WB55RG
+
+config BOARD
+	default "nucleo_wb55rg"
+
+if UART_CONSOLE
+
+config UART_1
+	default y
+
+endif # UART_CONSOLE
+
+if BT_DEBUG_MONITOR
+
+config UART_1
+	default y
+
+endif
+
+endif # BOARD_NUCLEO_WB55RG
diff --git a/boards/arm/nucleo_wb55rg/board.cmake b/boards/arm/nucleo_wb55rg/board.cmake
new file mode 100644
index 00000000000..5edccfb1a66
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/board.cmake
@@ -0,0 +1 @@
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
diff --git a/boards/arm/nucleo_wb55rg/doc/img/nucleowb55rg.jpg b/boards/arm/nucleo_wb55rg/doc/img/nucleowb55rg.jpg
new file mode 100644
index 00000000000..16602bd8005
Binary files /dev/null and b/boards/arm/nucleo_wb55rg/doc/img/nucleowb55rg.jpg differ
diff --git a/boards/arm/nucleo_wb55rg/doc/nucleowb55rg.rst b/boards/arm/nucleo_wb55rg/doc/nucleowb55rg.rst
new file mode 100644
index 00000000000..ae5a84bb97e
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/doc/nucleowb55rg.rst
@@ -0,0 +1,267 @@
+.. _nucleo_wb55rg_board:
+
+ST Nucleo WB55RG
+################
+
+Overview
+********
+
+The Nucleo WB55RG board is a multi-protocol wireless and ultra-low-power device
+embedding a powerful and ultra-low-power radio compliant with the Bluetooth®
+Low Energy (BLE) SIG specification v5.0 and with IEEE 802.15.4-2011.
+
+
+- STM32 microcontroller in VFQFPN68 package
+- 2.4 GHz RF transceiver supporting Bluetooth® specification v5.0 and
+  IEEE 802.15.4-2011 PHY and MAC
+- Dedicated Arm® 32-bit Cortex® M0+ CPU for real-time Radio layer
+- Three user LEDs
+- Board connector: USB user with Micro-B
+- Two types of extension resources:
+
+  - Arduino Uno V3 connectivity
+  - ST morpho extension pin headers for full access to all STM32 I/Os
+
+- Integrated PCB antenna or footprint for SMA connector
+- On-board ST-LINK/V2-1 debugger/programmer with SWD connector
+- Flexible power-supply options: ST-LINK USB VBUS or external sources
+- On-board socket for CR2032 battery
+- On-board ST-LINK/V2-1 debugger/programmer with USB re- enumeration capability:
+  mass storage, virtual COM port and debug port
+
+.. image:: img/nucleowb55rg.jpg
+   :width: 670px
+   :align: center
+   :height: 339px
+   :alt: Nucleo WB55RG
+
+More information about the board can be found at the `Nucleo WB55RG website`_.
+
+Hardware
+********
+
+STM32WB55RG is an ultra-low-power dual core Arm Cortex-M4 MCU 64 MHz,Cortex-M0 32MHz
+with 1 Mbyte of Flash memory, Bluetooth 5, 802.15.4, USB, LCD, AES-256 SoC and
+provides the following hardware capabilities:
+
+- Ultra-low-power with FlexPowerControl (down to 600 nA Standby mode with RTC and 32KB RAM)
+- Core: ARM |reg| 32-bit Cortex |reg|-M4 CPU with FPU, frequency up to 64 MHz
+- Radio:
+
+  - 2.4GHz
+  - RF transceiver supporting Bluetooth® 5 specification, IEEE 802.15.4-2011 PHY and MAC,
+    supporting Thread and ZigBee|reg| 3.0
+  - RX Sensitivity: -96 dBm (Bluetooth|reg| Low Energy at 1 Mbps), -100 dBm (802.15.4)
+  - Programmable output power up to +6 dBm with 1 dB steps
+  - Integrated balun to reduce BOM
+  - Support for 2 Mbps
+  - Dedicated Arm|reg| 32-bit Cortex|reg| M0 + CPU for real-time Radio layer
+  - Accurate RSSI to enable power control
+  - Suitable for systems requiring compliance with radio frequency regulations
+    ETSI EN 300 328, EN 300 440, FCC CFR47 Part 15 and ARIB STD-T66
+  - Support for external PA
+
+- Clock Sources:
+
+  - 32 MHz crystal oscillator with integrated trimming capacitors (Radio and CPU clock)
+  - 32 kHz crystal oscillator for RTC (LSE)
+  - 2x Internal low-power 32 kHz RC (|plusminus| 5% and |plusminus| 500ppm)
+  - Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by
+    LSE (better than  |plusminus| 0.25 % accuracy)
+  - 2 PLLs for system clock, USB, SAI and ADC
+
+- RTC with HW calendar, alarms and calibration
+- LCD 8 x 40 or 4 x 44 with step-up converter
+- Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors
+- 16x timers:
+
+  - 2x 16-bit advanced motor-control
+  - 2x 32-bit and 5x 16-bit general purpose
+  - 2x 16-bit basic
+  - 2x low-power 16-bit timers (available in Stop mode)
+  - 2x watchdogs
+  - SysTick timer
+
+- Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V
+- Memories
+
+  - Up to 1 MB Flash, 2 banks read-while-write, proprietary code readout protection
+  - Up to 320 KB of SRAM including 64 KB with hardware parity check
+  - External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories
+  - Quad SPI memory interface
+
+- 4x digital filters for sigma delta modulator
+- Rich analog peripherals (down to 1.62 V)
+
+  - 12-bit ADC 4.26Msps, up to 16-bit with hardware oversampling, 200 uA/Msps
+  - 2x ultra-low-power comparator
+  - Accurate 2.5 V or 2.048 V reference voltage buffered output
+
+- System peripherals
+
+  - Inter processor communication controller (IPCC) for communication with
+    Bluetooth|reg| Low Energy and 802.15.4
+  - HW semaphores for resources sharing between CPUs
+  - 2x DMA controllers (7x channels each) supporting ADC, SPI, I2C, USART,
+    QSPI, SAI, AES, Timers
+  - 1x USART (ISO 7816, IrDA, SPI Master, Modbus and Smartcard mode)
+  - 1x LPUART (low power)
+  - 2x SPI 32 Mbit/s
+  - 2x I2C (SMBus/PMBus)
+  - 1x SAI (dual channel high quality audio)
+  - 1x USB 2.0 FS device, crystal-less, BCD and LPM
+  - Touch sensing controller, up to 18 sensors
+  - LCD 8x40 with step-up converter
+  - 1x 16-bit, four channels advanced timer
+  - 2x 16-bits, two channels timer
+  - 1x 32-bits, four channels timer
+  - 2x 16-bits ultra-low-power timer
+  - 1x independent Systick
+  - 1x independent watchdog
+  - 1x window watchdog
+
+- Security and ID
+
+ - 3x hardware encryption AES maximum 256-bit for the application,
+   the Bluetooth|reg| Low Energy and IEEE802.15.4
+ - Customer key storage / key manager services
+ - HW public key authority (PKA)
+ - Cryptographic algorithms: RSA, Diffie-Helman, ECC over GF(p)
+ - True random number generator (RNG)
+ - Sector protection against R/W operation (PCROP)
+ - CRC calculation unit
+ - 96-bit unique ID
+ - 64-bit unique ID. Possibility to derive 802.15.5 64-bit and
+   Bluetooth|reg| Low Energy 48-bit EUI
+
+- Up to 72 fast I/Os, 70 of them 5 V-tolerant
+- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell |trade|
+
+
+More information about STM32WB55RG can be found here:
+
+- `STM32WB55RG on www.st.com`_
+- `STM32WB5RG datasheet`_
+
+Supported Features
+==================
+
+The Zephyr nucleo_wb55rg board configuration supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| UART      | on-chip    | serial port-polling;                |
+|           |            | serial port-interrupt               |
++-----------+------------+-------------------------------------+
+| PINMUX    | on-chip    | pinmux                              |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+
+Other hardware features are not yet supported on this Zephyr port.
+
+The default configuration can be found in the defconfig file:
+``boards/arm/nucleo_wb55rg/nucleo_wb55rg_defconfig``
+
+
+Connections and IOs
+===================
+
+Nucleo WB55RG Board has 6 GPIO controllers. These controllers are responsible for pin muxing,
+input/output, pull-up, etc.
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+
+- UART_1 TX/RX : PB7/PB6
+- USER_PB : PC4
+- USER_PB1 : PD0
+- USER_PB2 : PD1
+- LD1 : PB5
+- LD2 : PB0
+- LD3 : PB1
+
+System Clock
+------------
+
+Nucleo WB55RG System Clock could be driven by internal or external oscillator,
+as well as main PLL clock. By default System clock is driven by HSE clock at 32MHz.
+
+Serial Port
+-----------
+
+Nucleo WB55RG board has 2 (LP)U(S)ARTs. The Zephyr console output is assigned to USART1.
+Default settings are 115200 8N1.
+
+
+Programming and Debugging
+*************************
+
+Applications for the ``nucleo_wb55rg`` board configuration can be built the
+usual way (see :ref:`build_an_application`).
+
+Flashing
+========
+
+Nucleo WB55RG board includes an ST-LINK/V2-1 embedded debug tool
+interface.  This interface is not yet supported by the openocd version
+included in the Zephyr SDK. You can flash your application with drag and drop
+in the drive mounted when plugging your nucleo board to your PC.
+
+
+Flashing an application to Nucleo WB55RG
+----------------------------------------
+
+Connect the Nucleo WB55RG to your host computer using the USB port.
+Then build and flash an application. Here is an example for the
+:ref:`hello_world` application.
+
+Run a serial host program to connect with your Nucleo board:
+
+.. code-block:: console
+
+   $ minicom -D /dev/ttyUSB0
+
+Then build and flash the application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: nucleo_wb55rg
+   :goals: build
+
+You should see the following message on the console:
+
+.. code-block:: console
+
+   Hello World! arm
+
+Debugging
+=========
+
+While STM32WB55RG is not yet supported you can debug an application using pyocd.
+Here is an example for the :ref:`hello_world` application.
+Start pyocd gdbserver on your machine:
+
+.. code-block:: console
+
+   $ pyocd gdbserver
+
+Then launch debug on your board:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: nucleo_wb55rg
+   :maybe-skip-config:
+   :goals: debug
+
+.. _Nucleo WB55RG website:
+   https://www.st.com/en/evaluation-tools/p-nucleo-wb55.html
+
+.. _STM32WB55RG on www.st.com:
+   https://www.st.com/en/microcontrollers-microprocessors/stm32wb55rg.html
+
+.. _STM32WB5RG datasheet:
+   https://www.st.com/resource/en/datasheet/stm32wb55rg.pdf
diff --git a/boards/arm/nucleo_wb55rg/nucleo_wb55rg.dts b/boards/arm/nucleo_wb55rg/nucleo_wb55rg.dts
new file mode 100644
index 00000000000..89e770010b4
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/nucleo_wb55rg.dts
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2019 Linaro Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/wb/stm32wb55Xg.dtsi>
+
+/ {
+	model = "STMicroelectronics STM32WB55RG-NUCLEO board";
+	compatible = "st,stm32wb55rg-nucleo", "st,stm32wb55rg";
+
+	chosen {
+		zephyr,console = &usart1;
+		zephyr,shell-uart = &usart1;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		blue_led_1: led_0 {
+			gpios = <&gpiob 5 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LED1";
+		};
+		green_led_2: led_1 {
+			gpios = <&gpiob 0 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LED2";
+		};
+		green_led_3: led_2 {
+			gpios = <&gpiob 1 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LED3";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		user_button_1: button_0 {
+			label = "SW1";
+			gpios = <&gpioc 4 GPIO_INT_ACTIVE_LOW>;
+		};
+		user_button_2: button_1 {
+			label = "SW2";
+			gpios = <&gpiod 0 GPIO_INT_ACTIVE_LOW>;
+		};
+		user_button_3: button_2 {
+			label = "SW3";
+			gpios = <&gpiod 1 GPIO_INT_ACTIVE_LOW>;
+		};
+	};
+
+	aliases {
+		led0 = &green_led_2;
+		sw0 = &user_button_1;
+		sw1 = &user_button_2;
+	};
+};
+
+&usart1 {
+	current-speed = <115200>;
+	status = "ok";
+};
diff --git a/boards/arm/nucleo_wb55rg/nucleo_wb55rg.yaml b/boards/arm/nucleo_wb55rg/nucleo_wb55rg.yaml
new file mode 100644
index 00000000000..ef6ec5198dd
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/nucleo_wb55rg.yaml
@@ -0,0 +1,12 @@
+identifier: nucleo_wb55rg
+name: NUCLEO-WB55RG
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gccarmemb
+  - xtools
+ram: 96
+flash: 1024
+supported:
+  - gpio
diff --git a/boards/arm/nucleo_wb55rg/nucleo_wb55rg_defconfig b/boards/arm/nucleo_wb55rg/nucleo_wb55rg_defconfig
new file mode 100644
index 00000000000..7f4e8780e55
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/nucleo_wb55rg_defconfig
@@ -0,0 +1,36 @@
+CONFIG_ARM=y
+CONFIG_SOC_SERIES_STM32WBX=y
+CONFIG_SOC_STM32WB55XG=y
+CONFIG_CORTEX_M_SYSTICK=y
+# 32MHz system clock
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=32000000
+CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
+
+# enable uart driver
+CONFIG_SERIAL=y
+
+# enable pinmux
+CONFIG_PINMUX=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+# clock configuration
+CONFIG_CLOCK_CONTROL=y
+# SYSCLK selection
+#CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
+CONFIG_CLOCK_STM32_SYSCLK_SRC_HSE=y
+CONFIG_CLOCK_STM32_HSE_CLOCK=32000000
+
+CONFIG_CLOCK_STM32_CPU1_PRESCALER=1
+CONFIG_CLOCK_STM32_CPU2_PRESCALER=1
+CONFIG_CLOCK_STM32_APB1_PRESCALER=1
+CONFIG_CLOCK_STM32_APB2_PRESCALER=1
+CONFIG_CLOCK_STM32_AHB4_PRESCALER=1
+
+# console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
diff --git a/boards/arm/nucleo_wb55rg/pinmux.c b/boards/arm/nucleo_wb55rg/pinmux.c
new file mode 100644
index 00000000000..27038232c8f
--- /dev/null
+++ b/boards/arm/nucleo_wb55rg/pinmux.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2018 Linaro Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <kernel.h>
+#include <device.h>
+#include <init.h>
+#include <pinmux.h>
+#include <sys_io.h>
+
+#include <pinmux/stm32/pinmux_stm32.h>
+
+/* pin assignments for NUCLEO-WB55RG board */
+static const struct pin_config pinconf[] = {
+#ifdef CONFIG_UART_1
+	{STM32_PIN_PB7, STM32WBX_PINMUX_FUNC_PB7_USART1_RX},
+	{STM32_PIN_PB6, STM32WBX_PINMUX_FUNC_PB6_USART1_TX},
+#endif	/* CONFIG_UART_1 */
+};
+
+static int pinmux_stm32_init(struct device *port)
+{
+	ARG_UNUSED(port);
+
+	stm32_setup_pins(pinconf, ARRAY_SIZE(pinconf));
+
+	return 0;
+}
+
+SYS_INIT(pinmux_stm32_init, PRE_KERNEL_1,
+	 CONFIG_PINMUX_STM32_DEVICE_INITIALIZATION_PRIORITY);
diff --git a/dts/arm/st/wb/stm32wb55Xg.dtsi b/dts/arm/st/wb/stm32wb55Xg.dtsi
new file mode 100644
index 00000000000..3d9a9589a14
--- /dev/null
+++ b/dts/arm/st/wb/stm32wb55Xg.dtsi
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018 Linaro Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <mem.h>
+#include <st/wb/stm32wb55.dtsi>
+
+/ {
+	sram0: memory@20000000 {
+		reg = <0x20000000 DT_SIZE_K(96)>;
+	};
+
+	sram2a:memory@20030000 {
+		reg = <0x20030000 0x2800>;
+	};
+
+	sram2b:memory@20038000 {
+		reg = <0x20038000 0x5000>;
+	};
+
+
+	soc {
+		flash-controller@58004000 {
+			flash0: flash@8000000 {
+				reg = <0x08000000 DT_SIZE_K(1024)>;
+			};
+		};
+	};
+};