Main Street Historic District, National Register of Historic Places district in Miles City, United States.

Main Street Historic District is a central business area in Miles City, Montana, that stretches between Prairie Avenue and Fourth Street. It contains multiple commercial establishments, government buildings, and religious structures that remain in active use today.

The district developed through three major growth periods between 1882 and 1940, beginning with the arrival of the Northern Pacific Railroad. This rail connection catalyzed a transformation where wooden structures were replaced by brick buildings.

The Orschel brothers' clothing store at 511 Main served local cowboys until 1940, letting them keep trunks on the upper floor until they came to town to change. The Kenney Block's Montana Saloon keeps its original pressed tin ceiling, three-pillared back bar and leather booths. The Jackson Block's second floor housed the Montana Institute, a private school teaching automobile engineering, bookkeeping and stenography day and night.

The district is best explored on foot since buildings are arranged along a continuous street corridor. Visit during daylight to see the architectural details of the facades clearly.

The Kenney Block's saloon, redesigned by architect Brynjulf Rivenes in 1913, keeps one of Montana's best-preserved historic bar interiors: pressed tin ceiling, three-pillared back bar, mosaic floor tiles, paddle fans, leather booths, a wooden cooler and leaded glass. The building began as a saloon in 1893, became a saddlery from 1900 to 1907, and was bought by James Kenney in 1908.