De Baca County New Mexico has 5 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Fort Sumner Ruins and De Baca County Courthouse, Fort Sumner Cemetery Wall and Entry, Fort Sumner Community House and Fort Sumner Railroad Bridge.
Some of the country's most noteable architects helped create the De Baca County places including Alexander LaRue, Kerr & Walsh, Topeka & Santa Fe Railway Atchison and Works Progress Administration. Prominent architectural styles found in De Baca Country are Bungalow/Craftsman and Colonial Revival.