Olathe, KS -- U.S. city in Kansas Population (2000): 92962 Housing Units (2000): 33343 Land area (2000): 54.161437 sq. miles (140.277472 sq. km) Water area (2000): 0.304076 sq. miles (0.787554 sq. km) Total area (2000): 54.465513 sq. miles (141.065026 sq. km) FIPS code: 52575 Located within: Kansas (KS), FIPS 20 Location: 38.880788 N, 94.803184 W ZIP Codes (1990): 66061 66062 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Olathe, KS Olathe