Jefferson -- U.S. County in Texas Population (2000): 252051 Housing Units (2000): 102080 Land area (2000): 903.545049 sq. miles (2340.170834 sq. km) Water area (2000): 207.712069 sq. miles (537.971766 sq. km) Total area (2000): 1111.257118 sq. miles (2878.142600 sq. km) Located within: Texas (TX), FIPS 48 Location: 29.984230 N, 94.061768 W Headwords: Jefferson Jefferson, TX Jefferson County Jefferson County, TX