Ulm is a census-designated place in Cascade County, Montana, United States. It was originally a large ranch owned by Indiana-born cattleman William Ulm. The population was 750 at the 2000 census. It is part of the 'Great Falls, Montana Metropolitan Statistical Area'. Ulm apartments for rent comparison page shows most up to date rent information on Ulm apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.