Katy ISD, which encompasses many middle and high schools in the Katy, Texas area, generally
does provide lockers for students in its middle and high schools. However, it's not guaranteed across every single campus and the availability might change year to year based on student enrollment and school policies.
To be absolutely certain about locker availability at a *specific* Katy middle or high school, you should check the school's website or contact the school administration directly.