The first courthouse built in Reagan County was the site where the county’s officials were installed on May 8, 1903: Joseph J. Boyd, judge; J. B. Lucas, clerk; Henry Japson, sheriff and tax collector; Frank Ramsey, treasurer; W. C. Shamlin, surveyor; M. D. Sutherland, assessor; and commissioners Jno. E. Gardner, W. C. Castlebury, A. J. Kerchville, and G. F. Kirk. The county seat was moved in 1925 to Big Lake.