Collin County Texas (Historic Districts) has 7 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include McKinney Cotton Mill Historic District, Allen Water Station, Fairview H&TC Railroad Historic District, McKinney Commercial Historic District and McKinney Residential Historic District.
Some of the country's most noteable architects helped create the Collin County places including Texas Cotton Mill Co., Putnam Russell, John Martin, Houston & Texas Central RR Co. and Southern Pacific RR. Prominent architectural styles found in Collin Country are Early Commercial, Mixed (More Than 2 Styles From Different Periods) and Italianate.