One Piece Mansion (ワンピースマンション Wan Piisu Manshon) is a strategy video game that was developed and published by Capcom for the PlayStation in 2001. It is unrelated to the popular anime and manga series One Piece.

The storyline of One Piece Mansion revolves around a successful landlord called Polpo. At the start of the game, Polpo's little sister is kidnapped by the owner of a rival mansion, Chocola. It is the player's job to battle through levels meeting Chocola's objectives and to eventually free Polpo's little sister.