Manhoseong (만호성) is a fortress in Maryang-myeon, Gangjin county, Jeollanam-do. The fortress originally dates to the 15th century, although only a 220-meter wall remains today.
The remnants are visible when first entering Maryang via bus. To get there, walk west toward Maryang Church (마량교회). The wall is to the right of the church, around the bend.