Rockford is a mid-sized city located on both banks of the Rock River in the far north of Illinois, and is often referred to as 'The Forest City'. Rockford is the county seat of Winnebago County, Illinois, USA; the city has 150,115 residents, while the metro area has 339,178 residents as of the 2000 census and is the third largest city in Illinois, though it was the second largest city during the latter part of the 20th century. The current mayor is Lawrence J. Morrissey, an independent elected to a four year term in April 2005. Rockford apartments for rent comparison page shows most up to date rent information on Rockford apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.