The Clarion-Limestone Area School District is a small, rural, public school district which spans portions of two counties.

In Jefferson County it serves the Borough of Corsica and Union Township.

The Clarion-Limestone Area School District encompasses approximately 117 square miles (300 km2).

According to 2000 federal census data, it serves a resident population of 7,173.

In 2009, the District residents' per capita income was $17,013, while median family income was $38,633 per year.