ZIP Code 91739
91739 is one of California's ZIP codes, delivering to addresses in Rancho Cucamonga, San Bernardino County.
- City
- Rancho Cucamonga
- County
- San Bernardino County
- State
- California
- Prefix
- 917xx
Where this code sits
91739 is part of the 917xx range, the group of codes handled by one mail processing centre. Rancho Cucamonga is served by 5 ZIP codes in total; the full list, with the county each falls in, is on the Rancho Cucamonga page.
Rancho Cucamonga California ZIP codes →
Area codes over the same ground
Postal and telephone geography are drawn separately, so these codes cover the area 91739 delivers to without sharing its boundary.
ZIP codes nearest 91739
| ZIP code | Distance | Delivers to |
|---|---|---|
| ZIP code 91737 | 3.9 mi | Rancho Cucamonga, CA |
| ZIP code 91701 | 5.2 mi | Rancho Cucamonga, CA |
| ZIP code 92336 | 5.9 mi | Fontana, CA |
| ZIP code 92358 | 5.9 mi | Lytle Creek, CA |
| ZIP code 91729 | 6.2 mi | Rancho Cucamonga, CA |
| ZIP code 91730 | 6.2 mi | Rancho Cucamonga, CA |
| ZIP code 92331 | 6.3 mi | Fontana, CA |
| ZIP code 92377 | 6.6 mi | Rialto, CA |
Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope ZIP code 91739. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.