Brooklyn · St. Clair County, Illinois
Population 811 (est. 2026: ~600)
Source: Census ACS 2023 · ACS 2023 + -10.11% annual growth projection
Population 811 (est. 2026: ~600)
Source: Census ACS 2023 · ACS 2023 + -10.11% annual growth projection
Contact this office — local service-area, municipal code pointer, and corrections form.