Nine counties have joined three others and the Wind River Reservation in mandating masks in indoor public settings.
Natrona County's mandate was also approved and public health officials are holding a press conference Thursday to discuss the order.
During a meeting with county commissioners, Park County Public Health Officer Dr. Aaron Billin said these requests from individual counties are a reaction to Gov. Mark Gordon's desire for mask mandates to be up to local jurisdictions, despite pressure from numerous local public health officials in the state asking for a statewide one.
The nearly identical orders require people to wear masks or face coverings while inside retail and commercial businesses, local government buildings or while waiting in line.
Other locations where masks are now required include healthcare facilities, like a clinic or a veterinary office, and in public transportation or taxi and car services.
Minors are not required to wear the face coverings but those older than three years old are encouraged to do so.
The order does include exceptions for the mandate, such as people alone in their personal office and while socially distanced and eating indoors at a restaurant.