Round Lake is a northern suburb of Chicago in Lake County, Illinois, United States. Per the 2020 census, the population was 18,721. Geography Round Lake is located at (42.354045, -88.100529), about 55 miles northwest of Chicago's Loop. According to the 2010 census, Round Lake has a total area of , of which (or 97.07%) is land and (or 2.93%) is water. Highways Belvidere Road Big Hollow Road Demographics 2020 census Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race. 2000 Census As of 2010 United States Census, there were 18,289 people, 6,206 households, and 5,847 families residing in the village. The population increased 310% from the 2000 US Census total of 5,492. The population density was . There were 6,206 housing units at an average density of . The racial makeup of the village was 68.9% White, 10.77% African American, 0.5% Native American, 12.7% Asian, 0.07% Pacific Islander, 9.69% from other races, and 3.24% from two or more races. 35.3% of the population were Hispanic or Latino of any race. There 6,206 total housing units, of which 94.2% or (5,847) were occupied households. Of these occupied households 48% had children under the age of 18 living with them. 49.5% of the population was male, 50.5% female. 80% of the occupied homes were owner-occupied with the remaining 19.5% in renter-occupied. The average household size was 3.13 per home. In the village, the population was spread out, with 32.2% under the age of 18, 7% from 18 to 24, 43.5% from 25 to 49, 12.3% from 50 to 64, and 4.8% who were 65 years of age or older. As of Census 2000, the median income for a household in the village was $58,051, and the median income for a family was $61,277. Males had a median income of $43,063 versus $31,336 for females. The per capita income for the village was $21,585. 6.8% of the population and 6.5% of families were below the poverty line. Out of the total population, 6.7% of those under the age of 18 and 7.9% of those 65 and older were living below the poverty line. History While the retreating Wisconsin glacier left an attractive environment for farmers who entered western Lake County after the Black Hawk War of 1832, the numerous lakes and