Stafford is a city in the U.S. state of Texas, within the Houston?The Woodlands?Sugar Land metropolitan area. The city is mostly in FortBendCounty, with a small portion in HarrisCounty. As of the 2010 census, Stafford's population was 17,693, up from 15,681 at the 2000 census. As of 2015 the population had risen to an estimated 18,459.