The Linn County Courthouse is located on May’s Island in the middle of the Cedar River in Cedar Rapids, Iowa, United States. It, along with the Veterans Memorial Building, is a contributing property to the May's Island Historic District that was listed on the National Register of Historic Places in 1978. The courthouse is the third building the county has used for court functions and county administration.
The present courthouse was built of Bedford Limestone in the Beaux-Arts style. Ten columns adorn the front of the three-story building. The interior walls were built of travertine and marble covers the floors. The building sustained damage from the Iowa flood of 2008. The upper floors of the courthouse reopened in October that year.