Wario Land II is a game by Nintendo that was released in Western regions for the Game Boy in March 1998. This is the second installment of the Wario Land series (third counting Virtual Boy Wario Land). It is a 2D platformer starring Wario, the greedy treasure hunter, who was also the protagonist of the series' first game Wario Land: Super Mario Land 3.

While the game was originally released as a Super Game Boy-enhanced title outside of Japan, a version adding Game Boy Color support was released in Japan seven months later as one of the October 1998 launch titles, featuring colored sprites and backgrounds. This version came out later in Western regions as well. It was also rereleased for the Nintendo 3DS's Virtual Console in 2012. A successor to the game, Wario Land 3, was produced and released in 2000, which adapted most of this game's gameplay mechanics.