[5] The United States Census Bureau defines an urban area of northwest Chicago-area suburbs that are separated from Chicago's urban area, with Round Lake Beach as the principal city: the Round Lake Beach–McHenry–Grayslake, IL–WI urban area had a population of 261,835 as of the 2020 census, making it the 155th largest in the United States.

The village, along with the rest of the Round Lake area, has a significant Mexican population with many Latino businesses, restaurants, and shops throughout the town.

14.0% of all households were made up of individuals, and 4.5% had someone living alone who was 65 years of age or older.

Round Lake Beach has a station on Metra's North Central Service, which provides rail service between Antioch and Chicago Union Station Monday through Friday.

The village of Round Lake Beach does approximately $3 to $4 million in infrastructure improvement per year using TIF and MFT funds.