The Dallam County Courthouse, at Fifth and Denrock Sts. in Dalhart, Texas, is a historic courthouse that was built in 1923. It was designed by J. Roy Smith in Classical Revival style. It was listed on the National Register of Historic Places in 1992. It replaced a 1903 building; it was funded by a bond approved by voters in 1922. It was designed by Smith and Townes. It is made of brick with cast stone detailing, and serves the county still.