what county is simms mt in
Homefacts City Report. Simms is located in Cascade County, MT. The population is 343, making Simms the 9th largest city in Cascade County. There are 2 public schools in Simms with an average Homefacts rating of C. there are 1 registered sex offenders residing in the city. Unemployment in Simms is moderate and the median home sales price is $0.