Lake County
URL: https://knowledge.ivjn.us/en/places/il-lake-county.html

Lake County is a county in Illinois, United States, with county seat Waukegan.

## Administrative divisions

Lake County is a county in Illinois, United States; the county seat is Waukegan[^uscb2023].

## Basic facts

- State: [Illinois](https://knowledge.ivjn.us/en/places/illinois.html)
- County seat: Waukegan[^uscb2023]
- Division level: county[^uscb2023]

## Parent division

Located in [Illinois](https://knowledge.ivjn.us/en/places/illinois.html).

Updated: 2026-10-29

Relations:
- Located in: Illinois https://knowledge.ivjn.us/en/places/illinois.html

Mentioned in:
- Illinois https://knowledge.ivjn.us/en/places/illinois.html

Sources:
- Lake County (Wikipedia) https://en.wikipedia.org/wiki/Lake_County
- U.S. Census Bureau 2023 FIPS state and county codes https://www.census.gov/library/reference/code-lists/ansi.html