The current metro area population of Round Lake Beach-McHenry-Grayslake in 2025 is 399,000, a 1.27% increase from 2024.

• The metro area population of Round Lake Beach-McHenry-Grayslake in 2024 was 394,000, a 1.29% increase from 2023.
• The metro area population of Round Lake Beach-McHenry-Grayslake in 2023 was 389,000, a 1.57% increase from 2022.
• The metro area population of Round Lake Beach-McHenry-Grayslake in 2022 was 383,000, a 1.59% increase from 2021.