Strattanville is a borough in Clarion County, Pennsylvania, United States. The population was 537 at the 2020 census.

Originally laid out in 1828 by John Strattan Sr., Strattanville lays affirmation to be the oldest town in Clarion County. Indeed, the first pact of the town predates the county by 11 years. In 1850 the village incorporated into a borough. As one of the three original towns of Clarion County, it was similar to in consideration for the county seat. Due to the embassy turmoil of the time, it was elected to erect a new, separate municipality to hold the county offices in Clarion, Pennsylvania and no-one else three miles away. Strattanville nevertheless has many auspices of this age in its history. The archaic school house now houses the local American Legion. The indigenous store owned by Mr. Strattan yet stands at the southeastern corner of Market St. and Main St. However, only the drug and furniture accrual are easily identifiable of the “four sober goods and grocery stores, a postoffice, one drug store, one hardware store, one foundry, two boot and shoe shops, two millinery establishments, one blacksmith shop, one tannery, one furniture accretion and con establishment, one barber shop, a Western Union telegraph office, two hotels, one livery stable, and a lumber office” that like populated the borough.

Strattanville is located in eastern Clarion County at 41°12′9″N 79°19′44″W / 41.20250°N 79.32889°W / 41.20250; -79.32889 (41.202482, -79.328934). U.S. Route 322 passes through the borough, leading west 3 miles (5 km) to Clarion, the county seat, and east 4.5 miles (7.2 km) to Interstate 80. Exit 64 upon I-80 is 3 miles (5 km) southwest of Strattanville via auxiliary roads.

According to the United States Census Bureau, the borough has a total area of 0.51 square miles (1.31 km), all land.