Home›1849 establishments in Illinois›واترلو، ایلینوی🌐فارسیEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng Việtالعربيةفارسی中文日本語EntityQ535870· pop 37· linked from 377 articlesواترلو، ایلینویAlso known as Waterloo, Illinois, Waterloo, ILcity in Monroe County, Illinois, USAKey factsCountryUnited StatesStateIllinoisCountyMonroePrecincts16 , 17 , 18 , 19 , 26 , and 27Total8.31 sq mi (21.53 km )Land8.18 sq mi (21.19 km )Water0.14 sq mi (0.35 km )Elevation686 ft (209 m)Density1,352.0/sq mi (522.02/km )Time zoneUTC-6 ( CST )Summer dstUTC-5 ( CDT )Fips code17-79150WebsiteOn the mapAvailable in 37 languagesEspañolFrançaisDeutsch中文PortuguêsItalianoالعربيةazbBasqueCatalanCebuanoConnectionsrace and ethnicity in the United States CensusEntityUnited States Census BureauEntityCategories1849 establishments in IllinoisCities in IllinoisCities in Monroe County, IllinoisCounty seats in IllinoisMetro EastPopulated places in the United States established in 1849Waterloo, Illinois