Westmont Illinois ZIP Codes
Westmont holds a single ZIP code.
Every ZIP code in Westmont
| ZIP code | County |
|---|---|
| 60559 | DuPage 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Westmont codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Westmont. 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 Westmont ZIP code begins 605. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 65 ZIP codes, so Westmont accounts for 2% of it.
Every Illinois ZIP prefix and the region it covers →
Area codes covering Westmont
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 Westmont occupies.
Westmont Illinois area codes in full →
Where Westmont's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Westmont
| City | Distance | ZIP codes |
|---|---|---|
| Clarendon Hills Illinois ZIP codes | 0.9 mi | 1 ZIP code |
| Hinsdale Illinois ZIP codes | 2.3 mi | 2 ZIP codes |
| Willowbrook Illinois ZIP codes | 2.4 mi | 1 ZIP code |
| Downers Grove Illinois ZIP codes | 2.5 mi | 2 ZIP codes |
| Oak Brook Illinois ZIP codes | 3.1 mi | 1 ZIP code |
| Darien Illinois ZIP codes | 3.4 mi | 1 ZIP code |
| Western Springs Illinois ZIP codes | 3.8 mi | 1 ZIP code |
| La Grange Illinois ZIP codes | 5.2 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.