what county is katy, texas in?
Katy, TX. Katy is a city located in Harris, Fort Bend and Waller Counties in the U.S. state of Texas, within the HoustonâSugar LandâBaytown metropolitan area. The population was 11,775 at the 2000 census. Katy, suburb of Houston, Texas, is named for the Missouri-Kansas-Texas Railroad (commonly referred to as the K-T Railroad, now a part of Union Pacific) that ran through Katy in the 19th century.[citation needed] Katy was once known as Cane Island. The name is derived from Cane Island Creek which runs just west of downtown. Cane Creek is a branch of Buffalo Bayou. The origins of the name Cane Island are believed to be from the fact that Katy was once a major sugar cane producer and rice producer.