In the United States, Round Lake City is a incorporated city in Illinois. There are many places with that name. The United States Postal Service (USPS) designates it as a town or city, and some places use it for more than one purpose. In Round Lake, Illinois, it is used for both town and city purposes. The zip code for Round Lake City is D (Default). This is the preferred name for the city by USPS and its residents.
In 2016, the median age for residents was 46 years old. Twenty-one percent of households had children under the age of 18. Another 12.5% of households were headed by a female householder without her husband. Thirty-seven percent of households were non-families. A further 10.1% of households were headed by senior citizens, and a quarter of residents were children. In 2007, the population was fifty-one percent white and twenty-five percent non-white.
Round Lake, IL is a suburban community in Illinois. It has a population of 17,758 and is in Lake County. The median income in Round Lake is $42,355 per person. The poverty rate is 3.81%. The median age for people in Round Lake, IL is three percent older than the national average. The median household income in Round Lake, Illinois is higher than the national median of $65,712 per person.