This site was set aside as the Dimmitt town square in 1891, when Castro County was formally organized. Temporary court facilities operated in J. N. Morrison's office while the first courthouse was built. That ornate two-story structure burned in 1906 after lightning struck it. A brick courthouse with a central dome, built in 1908, was dedicated at a community picnic and served until the 1930s, when it was razed to make room for the present stone building. Castro County's third courthouse, built with Works Progress Administration labor, opened in 1939.