Wallowa County Courthouse was built in 1909–1910, using locally quarried Bowlby stone, a type of volcanic tuff. It is a Romanesque Revival-style building with Queen Anne architectural elements in some exterior features. The courthouse was listed on National Register of Historic Places in 2000. Today, it still houses Wallowa County government offices and faces west toward South River Street and is surrounded by "Courthouse Square" which encompasses one city block, approximately . The square is landscaped with oak, pine, maple, linden, juniper, and flowering crab apple trees. There are roses planted on the north, west, and south sides of the courthouse. The square also has several veteran memorials along with a wood-framed gazebo in the northeast corner of the square.