[5] In 1887, a post office called Clyde Park was established at the historic Harvey and Tregloan Ranch, where John Harvey owned a Clydesdale horse which he had imported from England in the late 1890s.

[5] The Harvey and Tregloan Ranch eventually was sold to Robert Shiplet.

The present-day Shiplet Ranch has historic barns that date to the 1870s or 80s, and its livestock brand is notably the shape of Montana.

[6] In 1909 the Northern Pacific Railway established a branch line to the town, and in 1912 it incorporated as Clyde Park.

[9] The town is also home to the Old Settler's Days, an annual celebration of pioneer history.

Area farmers have won world prizes for raising grain.

[11] According to the United States Census Bureau, the town has an area of 0.32 square miles (0.83 km2), all land.

The racial makeup of the town was 98.3% White, 0.7% Native American, 0.3% Asian, and 0.7% from other races.

36.0% of all households were made up of individuals, and 14.7% had someone living alone who was 65 years of age or older.

As of the census[16] of 2000, there were 310 people, including 137 households, and 83 families residing in the town.

[18] Shields Valley Public Schools educates students from kindergarten through 12th grade.