Seward -- U.S. County in Kansas Population (2000): 22510 Housing Units (2000): 8027 Land area (2000): 639.522942 sq. miles (1656.356746 sq. km) Water area (2000): 0.989432 sq. miles (2.562618 sq. km) Total area (2000): 640.512374 sq. miles (1658.919364 sq. km) Located within: Kansas (KS), FIPS 20 Location: 37.119500 N, 100.877378 W Headwords: Seward Seward, KS Seward County Seward County, KS