Old Mandan High School, superseded by a more modern Mandan High School some time ago, in Mandan, North Dakota, was listed on the National Register of Historic Places in 2017. After it served as high school it was Mandan Junior High. Its original buildings were built in 1917 and 1924 and are Tudor/Collegiate Gothic in style, designed by Gilbert R. Horton. Later additions were designed by three different architecture firms. Plans in 2017 were for the building to be renovated into 35 low-income housing units, utilizing funding which is opened by NRHP listing.