6th Street Smoke Shop, Vape Shop, & Hookahs! Hwy 6 & W Little York Rd | Head Shops Near Me. About Katy, Texas Katy is a city in the U.S. state of Texas, within the Houston–The Woodlands–Sugar Land metropolitan area. The city is approximately centered at the tripoint of Harris, Fort Bend, and Waller counties. Katy had a population of 14,102 at the 2010 census, up from 11,775 in 2000. Its population was estimated at 19,216 in 2018.First formally settled in the mid-1891s, Katy was a railroad town along the Missouri–Kansas–Texas (MKT) Railroad which ran parallel to U.S. Route 90 (today Interstate 10) into Downtown Houston. The fertile floodplain of Buffalo Bayou, which has its source near Katy, and its tributaries made Katy and other communities in the surrounding prairie an attractive location for rice farming.