As of Friday, October 9th, Yellowstone County has 155 new cases, 1,377 active cases, and 4,050 total cases of COVID-19 – find data for other counties here. Yellowstone County currently accounts for 23.3% of the total cases in Montana.Persons ages 20-39 are contracting COVID-19 most frequently, comprising 39% of cases in Yellowstone County. Montana ranks 39th within a state by state comparison of number of cases per 100,000 individuals. The CDC reports an average of 1,512 cases and 18 deaths per 100,000 residents. The statewide status of cases is summarized in the table below.
Current Status of Cases for Montana
Number of Cases (percent of total) for Montana
Recovering and Released from Isolation
Total Number of Cases
Local, state, and federal health experts have warned residents that COVID-19 spreads rapidly in congregate settings. The CDC defines congregate settings as places where individuals “gather together closely for social, leisure, and recreational activities, shared dining, and/or use of shared equipment, such as kitchen appliances, laundry facilities, stairwells, and elevators”. There have been 364 congregate settings in Montana with reported outbreaks of COVID-19. The COVID-19 outbreaks in Montana that can be traced back to congregate settings are displayed by type of setting below.