Cameron is an unincorporated community in Warren County, Illinois, United States. Cameron is 7 miles east-southeast of Monmouth. Cameron has a post office with ZIP code 61423. Cameron is at the junction of the old Chicago, Burlington and Quincy and Santa Fe Railroads, both now owned by BNSF. Cameron is the site of a 1996 connection track that was built between the former Burlington Northern line and the former Santa Fe's Chilicothe Subdivision, when the two merged to form the BNSF.