found: GeoNames, Apr. 1, 2015(ppl; N 41° 53' 6'' W 87° 47' 4''; also civil township named Oak Park in Cook County, IL)
found: Sokol, David M. Oak Park, Illinois: Continuity and Change, c2000:p. 9 (Ridgeland, or today's East Oak Park...)
found: A history of the origin of the place names connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha Railways, c1908:p. 109 (The settlement was first known as Kettlestrings' Grove [no publs. in LC database]. The second name was Oak Ridge [1840s; no publs. in LC database]. When in the summer of 1848, the railroad reached here from Chicago, the station was named Harlem [no publs. in LC database] ... and the post office was named Noyesville [no publs. in LC database].... The present name ... was adopted [on Apr. 18, 1871])