Phillips County Colorado has 10 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Heginbotham, W. E., House and Reimer--Smith Oil Station, Evergreen Corner Rural Historic District, First National Bank of Haxtun and Hargreaves Homestead Rural Historic District.
Some of the country's most noteable architects helped create the Phillips County places including Michael McEachern, Robert Buchholz, John Harms, Fred Gansemer and Eugene Groves. Prominent architectural styles found in Phillips Country are Colonial Revival, Early Commercial and Bungalow/Craftsman.