Romeoville is a village in Will County, Illinois, United States. The population was 21,153 at the 2000 census. As of 2006 the population has grown to 36,837. It is located in the southwest suburban area of Chicago near the newly constructed I-355 extension south from the Stevenson Expressway (I-55) to I-80. The Santa Fe Railway formerly operated a station at Romeoville Station.
Romeoville is located at 41°38′26″N 88°6′10″W / 41.64056°N 88.10278°W / 41.64056; -88.10278 (41.640480, -88.102907).
According to the United States Census Bureau, the village has a total area of 14.9 square miles (38.6 km²), of which, 14.5 square miles (37.6 km²) of it is land and 0.4 square miles (1.0 km²) of it (2.55%) is water.