Clyde Park was originally called Sunnyside, which also was the name of 'Madame Bulldog's' stage stop. The first post office was established at Madame's place in 1885 with Sarah Robinson as postmaster. In 1887 the office was moved to the Messrs' ranch. The Messrs' raised Clydesdale horses, which were imported from England. The name was then changed to Clyde Park in reference to the park-like landscape and the horses. The post office was then renamed and moved the the park area. In 1900 it was moved again to the current location at the four-way crossing of the roads. In 1914 the Northern Pacific Railroad was established in Shields Valley past Clyde Park.
Clyde Park is located in in the south central area of Montana. It is north of Livingston on Highway 83.