what county is killeen texas in
Killeen is a city in Bell County, Texas, United States. According to the 2010 United States Census, the city's population was 127,921, making it the 22nd most populous city in Texas.It is the principal city of the Killeenâ Temple â Fort Hood Metropolitan Statistical Area.illeen is 16 miles (26 km) west of Belton, the county seat and nearest access to Interstate 35. According to the United States Census Bureau, the city has a total area of 54.2 square miles (140.5 km 2), of which 53.6 square miles (138.8 km 2) is land and 0.66 square miles (1.7 km 2), or 1.24%, is water.