County health departments have launched waitlists for adults 16 years old and over. You can register to recieve the vaccination in Collin, Dallas, Denton and Tarrant counties. Links are below: You do not need to be a resident of the county to register for a COVID-19 vaccine in that county -- registration is open to anyone in Texas. For those without internet access, Tarrant County is also taking registrations by phone at 817-248-6299. In Dallas County, call the DCHHS vaccine hotline at 1-855-IMMUNE9 (1-855-466-8639). In Denton County, call 940-349-2585. For a more detailed breakdown of who is included in each priority group in Texas, see this page from the Texas DSHS.