High Quality Content by WIKIPEDIA articles! Rochelle is a city in Ogle County, Illinois, United States. The population was 9,574 at the 2010 census, up from 9,424 at the 2000 census. Rochelle is about 75 miles (121 km) west of Chicago and 25 miles (40 km) south of Rockford. Rochelle is the birthplace and hometown of three-time Academy Award nominee Joan Allen.