Katy began as a railroad and rice town on the coastal prairie west of Houston and is now surrounded by new subdivisions. Houses set on open grassland sit on top of the fire ants and subterranean termites that were in the soil first.
Katy stands where Harris, Fort Bend and Waller counties meet, 29 miles west of downtown Houston on Interstate 10 and about 138 feet above sea level. The city proper counted 21,894 residents in the 2020 census. Greater Katy, the territory of the 181-square-mile Katy Independent School District, is far bigger and takes in communities such as Cinco Ranch, Grand Lakes, Seven Meadows and Firethorne.
James Oliver Thomas laid out the town in 1895 beside the Missouri-Kansas-Texas Railroad, the K-T that gave the place its name. Early settlers contended with hot summers and thick clay soil, but rice did well; the first concrete rice driers in Texas were built here in 1944 and still stand as landmarks. Buffalo Bayou rises near Katy, and the opening of Interstate 10 in 1966 brought Houston's growth out across the prairie.