Charles City Junior-Senior High School, also known as the North Grand Building, is a historic building located in Charles City, Iowa, United States. It replaced a high school building completed in 1899 that was destroyed in a fire. The portion of the present building along Grand Avenue was built from 1931 to 1932, and served as the community's high school into the late 1960s when the current high school building was completed. This building then became a junior high school and then a middle school. A large addition was built onto the rear of the building in 1970. They vacated part of this building when the new middle school opened in 2016. The older section of the building was listed on the National Register of Historic Places in 2017. It is slated to be converted into 35 market-rate apart