Union County Courthouse is a historic courthouse building located at Monroe, Union County, North Carolina. The original Late Victorian section, was built in 1886, consisted of a two-story five-bay main block with a two-bay wing on each side. It has a low hip roof surmounted by a large cupola. Two additional three-bay wings were added in 1922. It was listed on the National Register of Historic Places in 1971. It is located in the Monroe Downtown Historic District.