The Champaign-Urbana Metropolitan Area, also known as Chambana, is a region in east central Illinois. The region is home to roughly 150,000 residents and encompasses the cities of Champaign, Urbana, and the village of Savoy. Students at the University of Illinois at Urbana-Champaign are included in this estimate of residents due to the fact that they are typically discounted from the official city census as they are not permanent residents.

Champaign-Urbana is home to University of Illinois at Urbana-Champaign, the flagship campus of the University of Illinois system, as well as the University of Illinois Research Park. It has become a major research center and houses many companies and research entities, including: iCyt (a biotechnology company); the Illinois Natural History Survey; the Illinois State Geological Survey; Motorola; the National Center for Supercomputing Applications; Phonak; PowerWorld; and the Science Applications International Corporation. The CU Metro area has a total area of 106.3 km˛ (41.0 mi˛) and a population of 124,000 (as of the 2000 census) giving it a population density of roughly 1,200/km˛ (3,000/mi˛). Exact numbers are typically inaccurate due to the fluctuating student population and inconsistent practices used when discounting students as residents. However, official estimates place the population of the entire metro area at approximately 150,000.