Regional Schools
School Districts
- Benton Area
- Berwick Area
- Bloomsburg Area
- Central Columbia
- Danville Area
- Lewisburg Area
- Line Mountain
- Midd-West
- Mifflinburg Area
- Millville Area
- Milton Area
- Mount Carmel Area
- Selinsgrove Area
- Shamokin Area
- Shikellamy
- Southern Columbia Area
- Warrior Run
Benton Area
Berwick Area
Bloomsburg Area
Central Columbia
Danville Area
Lewisburg Area
Line Mountain
Midd-West
Mifflinburg Area
Millville Area
Milton Area
Mount Carmel Area
Selinsgrove Area
Shamokin Area
Shikellamy
Southern Columbia Area
Warrior Run
Career and Technical Centers
Non-Public Schools Serviced by CSIU
- Bloomsburg Christian
- Columbia County Christian
- Fern Hill
- Greenwood Friends
- Maranatha Christian
- Meadowbrook Christian
- Meadowview Christian Academy
- Northumberland Christian
- Our Lady of Lourdes Regional
- Penn View Christian Academy
- River Valley Nature
- St. Columba
- St. Cyril Preschool and Kindergarten
- St. Joseph