ZIP code 94540
Where is ZIP code 94540?
Hayward, California
Alameda County · PO Box only ZIP code
ZIP code 94540 belongs to Hayward, California in Alameda County. 94540 is a PO Box only ZIP code: it is used for post office boxes at the Hayward post office, not for street addresses. It is in the Pacific Time zone and uses area code 510. The closest ZIP codes are 94537 (Fremont, 0 mi north), 94557 (Hayward, 0 mi north) and 94588 (Pleasanton, 1.5 mi east).
| ZIP code | 94540 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Hayward |
| State | California (CA) |
| County | Alameda County |
| Time zone | Pacific Time · now |
| Area code | 510 |
| Coordinates | 37.6802, -121.9215 map |
| 3-digit prefix | 945 |
The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.
ZIP codes near 94540
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 94537 | Fremont, CA | 0 mi N | PO Box only |
| 94557 | Hayward, CA | 0 mi N | PO Box only |
| 94588 | Pleasanton, CA | 1.5 mi E | Standard |
| 94568 | Dublin, CA | 2.5 mi N | Standard |
| 94566 | Pleasanton, CA | 2.7 mi E | Standard |
| 94586 | Sunol, CA | 5 mi S | Standard |
| 94583 | San Ramon, CA | 5.5 mi N | Standard |
| 94582 | San Ramon, CA | 5.8 mi N | Standard |
| 94552 | Castro Valley, CA | 6.8 mi W | Standard |
| 94570 | Moraga, CA | 7 mi N | PO Box only |
| 94575 | Moraga, CA | 7 mi N | Standard |
| 94542 | Hayward, CA | 7 mi W | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 94540 or measure the distance to another ZIP code.
How to address mail to 94540
PO BOX 123
HAYWARD CA 94540
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (94540-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Hayward, CA
All Hayward ZIP codes with population and income →
Questions
- What city is ZIP code 94540?
- 94540 is a Hayward, California ZIP code.
- What county is 94540 in?
- ZIP code 94540 is in Alameda County, California.
- What time zone is ZIP code 94540 in?
- 94540 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 94540?
- Phone numbers in ZIP code 94540 use area code 510.
- Can I use 94540 for a street address?
- No. 94540 is only for PO Boxes. Street addresses in Hayward use 94541, 94542, 94544.
- What ZIP codes are near 94540?
- The nearest ZIP codes to 94540 are 94537 (Fremont, 0 miles), 94557 (Hayward, 0 miles), 94588 (Pleasanton, 1.5 miles) and 94568 (Dublin, 2.5 miles).