diff --git a/boards/deprecated.cmake b/boards/deprecated.cmake
index 0d1d0d35d6d..89fe2515d02 100644
--- a/boards/deprecated.cmake
+++ b/boards/deprecated.cmake
@@ -409,6 +409,10 @@ set(native_posix_64_DEPRECATED
     native_posix/native/64
 )
 
+set(native_sim_64_DEPRECATED
+    native_sim/native/64
+)
+
 set(nrf21540dk_nrf52840_DEPRECATED
     nrf21540dk
 )
diff --git a/boards/native/native_sim/Kconfig b/boards/native/native_sim/Kconfig
index e61028cce07..c2610e840e7 100644
--- a/boards/native/native_sim/Kconfig
+++ b/boards/native/native_sim/Kconfig
@@ -12,15 +12,6 @@ config BOARD_NATIVE_SIM
 	  Native simulator (Single Core)
 	  Will produce a console Linux process which can be executed natively.
 
-config BOARD_NATIVE_SIM_64
-	bool
-	select BOARD_NATIVE_SIM
-	select 64BIT
-	help
-	  Native simulator (Single Core) - 64 bit version
-	  Will produce a console Linux process which can be executed natively
-	  as a 64-bit executable.
-
 if BOARD_NATIVE_SIM
 
 comment "Native Simular (Single Core) options"
diff --git a/boards/native/native_sim/Kconfig.native_sim_64 b/boards/native/native_sim/Kconfig.native_sim_64
deleted file mode 100644
index c03791abd35..00000000000
--- a/boards/native/native_sim/Kconfig.native_sim_64
+++ /dev/null
@@ -1,5 +0,0 @@
-# Copyright (c) 2024 Nordic Semiconductor ASA
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_NATIVE_SIM_64
-	select SOC_POSIX
diff --git a/boards/native/native_sim/board.yml b/boards/native/native_sim/board.yml
index 31ee9fabc08..19492170138 100644
--- a/boards/native/native_sim/board.yml
+++ b/boards/native/native_sim/board.yml
@@ -5,11 +5,3 @@ boards:
   - name: native
     variants:
     - name: "64"
-
-# This board definition below, together with its respective
-# Kconfig.native_sim_64 exist for backwards compatibility with the hwmv1 board name
-# Once all its usage in tree is removed, or an alias has been introduced they can be removed.
-- name: native_sim_64
-  vendor: zephyr
-  socs:
-  - name: native
diff --git a/boards/native/native_sim/native_sim_64.dts b/boards/native/native_sim/native_sim_64.dts
deleted file mode 100644
index 4ac77d414f9..00000000000
--- a/boards/native/native_sim/native_sim_64.dts
+++ /dev/null
@@ -1,7 +0,0 @@
-/*
- * Copyright (c) 2023 Nordic Semiconductor ASA
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#include "native_sim.dts"
diff --git a/boards/native/native_sim/native_sim_64_defconfig b/boards/native/native_sim/native_sim_64_defconfig
deleted file mode 100644
index b0033eda61f..00000000000
--- a/boards/native/native_sim/native_sim_64_defconfig
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-
-CONFIG_CONSOLE=y
-CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=1000000