Illinois Valley Central Unit District 321 is the school district in the northeast corner of Peoria County, Illinois, including the communities of Chillicothe, Mossville, and Rome, Illinois. Schools Illinois Valley Central High School, Chillicothe: usually referred to as "IVC" or occasionally still as "Chillicothe" Chillicothe Elementary Center (CEC), Chillicothe: approximately 495 students Mossville School, Mossville: approximately 800 students South Elementary School, Chillicothe: approximately 285 students External links IVC District #321 — official website Education in Peoria County, Illinois School districts in Illinois