All Williamson County Tax Office lobbies will be closed to the public on Wednesday, May 18, due to a staffing shortage.  Drive-thrus at the Round Rock and Cedar Park locations will remain open. Office lobbies will reopen at 8 a.m. on Thursday, May 20. Williamson County residents can get the registrations renewed at all Williamson County HEB Business Centers and AAA locations. 
 
For answers to many questions regarding property taxes or motor vehicle transactions, visit the Tax Assessor-Collector’s website at www.wilco.org/taxoffice or call 512-943-1601. Additionally, the Tax Assessor-Collector office locations and regular hours can be found here.