what county is geyser, mt in?
Geyser, Montana. Homefacts City Report. Geyser is located in Judith Basin County, MT. The population is 24, making Geyser the 3rd largest city in Judith Basin County. There are 3 public schools in Geyser with an average Homefacts rating of D. there are 0 registered sex offenders residing in the city.