diff --git a/targets/TARGET_STM/TARGET_STM32L5/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/CMakeLists.txt
new file mode 100644
index 0000000000..fb2499e8dd
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/CMakeLists.txt
@@ -0,0 +1,28 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+if("TARGET_STM32L552xC" IN_LIST MBED_TARGET_LABELS)
+    add_subdirectory(TARGET_STM32L552xC)
+elseif("TARGET_STM32L552xE" IN_LIST MBED_TARGET_LABELS)
+    add_subdirectory(TARGET_STM32L552xE)
+elseif("TARGET_STM32L562xE" IN_LIST MBED_TARGET_LABELS)
+    add_subdirectory(TARGET_STM32L562xE)
+endif()
+
+add_subdirectory(STM32Cube_FW)
+
+target_sources(mbed-core
+    INTERFACE
+        analogin_device.c
+        analogout_device.c
+        flash_api.c
+        gpio_irq_device.c
+        pwmout_device.c
+        serial_device.c
+        spi_api.c
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+)
diff --git a/targets/TARGET_STM/TARGET_STM32L5/STM32Cube_FW/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/STM32Cube_FW/CMakeLists.txt
new file mode 100644
index 0000000000..1bea24e400
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/STM32Cube_FW/CMakeLists.txt
@@ -0,0 +1,107 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+target_sources(mbed-core
+    INTERFACE
+        STM32L5xx_HAL_Driver/stm32l5xx_hal.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_adc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_adc_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_comp.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_cortex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_crc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_crc_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_cryp.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_cryp_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_dac.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_dac_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_dfsdm.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_dfsdm_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_dma.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_dma_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_exti.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_fdcan.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_flash.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_flash_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_flash_ramfunc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_gpio.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_gtzc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_hash.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_hash_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_i2c.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_i2c_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_icache.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_irda.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_iwdg.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_lptim.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_mmc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_mmc_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_nand.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_nor.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_opamp.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_opamp_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_ospi.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_otfdec.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_pcd.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_pcd_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_pka.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_pwr.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_pwr_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_rcc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_rcc_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_rng.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_rng_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_rtc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_rtc_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_sai.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_sai_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_sd.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_sd_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_smartcard.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_smartcard_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_smbus.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_spi.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_spi_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_sram.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_tim.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_tim_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_tsc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_uart.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_uart_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_usart.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_usart_ex.c
+        STM32L5xx_HAL_Driver/stm32l5xx_hal_wwdg.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_adc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_comp.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_crc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_crs.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_dac.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_dma.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_exti.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_fmc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_gpio.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_i2c.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_lptim.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_lpuart.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_opamp.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_pka.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_pwr.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_rcc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_rng.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_rtc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_sdmmc.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_spi.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_tim.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_ucpd.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_usart.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_usb.c
+        STM32L5xx_HAL_Driver/stm32l5xx_ll_utils.c
+        system_stm32l5xx.c
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+        CMSIS
+        STM32L5xx_HAL_Driver
+        STM32L5xx_HAL_Driver/Legacy
+)
diff --git a/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xC/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xC/CMakeLists.txt
new file mode 100644
index 0000000000..e775157385
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xC/CMakeLists.txt
@@ -0,0 +1,22 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+if(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
+    set(STARTUP_FILE TOOLCHAIN_GCC_ARM/startup_stm32l552xx.S)
+    set(LINKER_FILE TOOLCHAIN_GCC_ARM/stm32l552xc.ld)
+elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
+    set(STARTUP_FILE TOOLCHAIN_ARM/startup_stm32l552xx.S)
+    set(LINKER_FILE TOOLCHAIN_ARM/stm32l552xc.sct)
+endif()
+
+set_property(GLOBAL PROPERTY MBED_TARGET_LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+
+target_sources(mbed-core
+    INTERFACE
+        ${STARTUP_FILE}
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+)
diff --git a/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xE/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xE/CMakeLists.txt
new file mode 100644
index 0000000000..5da6f7576d
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xE/CMakeLists.txt
@@ -0,0 +1,26 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+if("NUCLEO_L552ZE_Q" IN_LIST MBED_TARGET_LABELS)
+    add_subdirectory(TARGET_NUCLEO_L552ZE_Q)
+endif()
+
+if(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
+    set(STARTUP_FILE TOOLCHAIN_GCC_ARM/startup_stm32l552xx.S)
+    set(LINKER_FILE TOOLCHAIN_GCC_ARM/stm32l552xc.ld)
+elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
+    set(STARTUP_FILE TOOLCHAIN_ARM/startup_stm32l552xx.S)
+    set(LINKER_FILE TOOLCHAIN_ARM/stm32l552xc.sct)
+endif()
+
+set_property(GLOBAL PROPERTY MBED_TARGET_LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+
+target_sources(mbed-core
+    INTERFACE
+        ${STARTUP_FILE}
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+)
diff --git a/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xE/TARGET_NUCLEO_L552ZE_Q/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xE/TARGET_NUCLEO_L552ZE_Q/CMakeLists.txt
new file mode 100644
index 0000000000..118fbc1189
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L552xE/TARGET_NUCLEO_L552ZE_Q/CMakeLists.txt
@@ -0,0 +1,12 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+target_sources(mbed-core
+    INTERFACE
+        PeripheralPins.c
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+)
diff --git a/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L562xE/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L562xE/CMakeLists.txt
new file mode 100644
index 0000000000..d64ffa8875
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L562xE/CMakeLists.txt
@@ -0,0 +1,26 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+if("DISCO_L562QE" IN_LIST MBED_TARGET_LABELS)
+    add_subdirectory(TARGET_DISCO_L562QE)
+endif()
+
+if(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
+    set(STARTUP_FILE TOOLCHAIN_GCC_ARM/startup_stm32l562xx.S)
+    set(LINKER_FILE TOOLCHAIN_GCC_ARM/stm32l562xe.ld)
+elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
+    set(STARTUP_FILE TOOLCHAIN_ARM/startup_stm32l562xx.S)
+    set(LINKER_FILE TOOLCHAIN_ARM/stm32l562xe.sct)
+endif()
+
+set_property(GLOBAL PROPERTY MBED_TARGET_LINKER_FILE ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+
+target_sources(mbed-core
+    INTERFACE
+        ${STARTUP_FILE}
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+)
diff --git a/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L562xE/TARGET_DISCO_L562QE/CMakeLists.txt b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L562xE/TARGET_DISCO_L562QE/CMakeLists.txt
new file mode 100644
index 0000000000..118fbc1189
--- /dev/null
+++ b/targets/TARGET_STM/TARGET_STM32L5/TARGET_STM32L562xE/TARGET_DISCO_L562QE/CMakeLists.txt
@@ -0,0 +1,12 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+target_sources(mbed-core
+    INTERFACE
+        PeripheralPins.c
+)
+
+target_include_directories(mbed-core
+    INTERFACE
+        .
+)