Deer is a cdp located in Rosebud County, in the state of Montana (MT), United States. Nestled in the Mountain division of the West region, it covers an area of 55.6 square miles (144.0 km²) and sits at an elevation of 3354 ft. With a population of approximately 2,018 residents, Deer offers a peaceful, rural atmosphere.
The town's population is composed of about 48.36% males and 51.64% females, and it has a population density of 36.29 people per square mile (14.01/km²). Deer lies at a latitude of 45.62 and a longitude of -106.66, operating in the UTC-7.
Locals reflect a blend of American ancestry, with roots primarily in United States (0%), followed by English (0%), German (1.9%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 59043.