Armstrong -- U.S. County in Texas Population (2000): 2148 Housing Units (2000): 920 Land area (2000): 913.632128 sq. miles (2366.296248 sq. km) Water area (2000): 0.177237 sq. miles (0.459042 sq. km) Total area (2000): 913.809365 sq. miles (2366.755290 sq. km) Located within: Texas (TX), FIPS 48 Location: 35.006834 N, 101.371120 W Headwords: Armstrong Armstrong, TX Armstrong County Armstrong County, TX