A previous mandate from the county was set to expire Dec. 29 at midnight.
The same exceptions to the previous mandate will apply, including for those who cannot wear a mask mandate due to health conditions and for residents who are outdoors, as long as they are able to stay six feet away from others.
Exemptions also apply to residents age 12 and younger; however, it does not apply to students on school grounds, as both Williamson County Schools and Franklin Special School District have face mask requirements.
As of Dec. 28, Williamson County had 2,310 active coronavirus cases.
See the full declaration below.