Phillips County Colorado has 5 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, First National Bank of Haxtun, Phillips County Courthouse and Shirley Hotel.
Some of the country's most noteable architects helped create the Phillips County places including Michael McEachern and Eugene Groves. Prominent architectural styles found in Phillips Country are Early Commercial, Bungalow/Craftsman and Colonial Revival.