KCC serves the 130,000 residents of Community College District 520, which includes all of Kankakee and Iroquois counties and portions of Ford, Grundy, Livingston and Will counties.

High schools served by KCC District 520 include:

• Bishop McNamara
• Bradley Bourbonnais (District 307)
• Central (District 4)
• Crescent-Iroquois (District 252)
• Donovan (District 3)
• Dwight Township (District 230)
• Emington only
• Grace Baptist Academy
• Grant Park (District 6)
• Herscher (District 2)
• Iroquois West (District 10)
• Kankakee (District 111)
• Manteno (District 5)
• Milford (District 233) Stockland Township only
• Momence (District 1)
• Pontiac Township (District 90) Emington and Saunemin only
• Reed-Cusrter (District 255U) Essex only 
• St. Anne (District 302)
• Tri-Point (District 6)
• Watseka (District 9)