Lake Forest Illinois ZIP Codes
Lake Forest holds a single ZIP code.
Every ZIP code in Lake Forest
| ZIP code | County |
|---|---|
| 60045 | Lake County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Lake Forest codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Lake Forest. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Lake Forest ZIP code begins 600. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 82 ZIP codes, so Lake Forest accounts for 1% of it.
Every Illinois ZIP prefix and the region it covers →
Area codes covering Lake Forest
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Lake Forest occupies.
Lake Forest Illinois area codes in full →
Where Lake Forest's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Lake Forest
| City | Distance | ZIP codes |
|---|---|---|
| Highwood Illinois ZIP codes | 3.0 mi | 1 ZIP code |
| Lake Bluff Illinois ZIP codes | 3.3 mi | 1 ZIP code |
| Lincolnshire Illinois ZIP codes | 4.1 mi | 1 ZIP code |
| Highland Park Illinois ZIP codes | 4.4 mi | 1 ZIP code |
| Deerfield Illinois ZIP codes | 4.8 mi | 1 ZIP code |
| Vernon Hills Illinois ZIP codes | 5.3 mi | 1 ZIP code |
| North Chicago Illinois ZIP codes | 5.6 mi | 2 ZIP codes |
| Libertyville Illinois ZIP codes | 6.5 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.