The Champaign–Urbana metropolitan area, also known as Champaign–Urbana and Urbana–Champaign as well as Chambana (colloquially), is a metropolitan area in east-central Illinois. As defined by the Office of Management and Budget (OMB), the metropolitan area has a population of 235,608 as of the 2023 U.S. Census Bureau estimate, which ranks it as the 201st largest metropolitan statistical area in the U.S. The area is anchored by the principal cities of Champaign and Urbana, and is home to the University of Illinois Urbana-Champaign, the flagship campus of the University of Illinois system.