CountryUnited States CountyClinton Area code(s)618 Elevation142 m
StateIllinois Time zoneCentral (CST) (UTC-6) GNIS feature ID404717 Local timeThursday 8:06 PM
Weather2°C, Wind NW at 14 km/h, 84% Humidity
Boulder is an unincorporated community in Clinton County, Illinois, United States. Boulder is located on the eastern shore of Carlyle Lake; a railroad line crosses the lake from Boulder to Keyesport.