Foster City, CA ZIP Codes
One ZIP code serves Foster City, California: 94404. Together they are home to 35,881 residents in 14,717 households.
Foster City city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 32,792 |
| Households | 12,998 |
| Median household income | $199,143 |
| Median home value | $1,838,200 |
| Median age | 39.5 |
| Median rent | $3,501 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 35,881 |
| Households (sum of ZIP codes) | 14,717 |
| Median household income, range across ZIP codes | $192,332 (94404) to $192,332 (94404) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $192,332 |
| Homeowners | 51.2% |
| Households with kids under 18 | 32.6% |
| Moved in the past year | 17.8% |
| Carrier routes in EDDM2GO's route library | 26 routes, 15,551 homes (1 of 1 ZIP codes) |
Every ZIP code in Foster City
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 94404 | San Mateo | 35,881 | 14,717 | $192,332 | $1,714,400 | 51.2% | 32.6% | 17.8% | 26 | 16,134 | 87% of its land |
A ZIP code is listed for Foster City when at least 10% of its land lies inside Foster City city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Foster City. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Foster City.
Counties
- San Mateo County — 31 ZIP codes
Nearby cities sharing these ZIP codes
- San Mateo — 4 ZIP codes
Price a mailing to Foster City ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Foster City, CA?
- 94404. A ZIP code is listed for Foster City when at least 10% of its land lies inside Foster City city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Foster City.
- What is the population of Foster City, CA?
- The Census Bureau counts 32,792 residents inside Foster City city limits (ACS 2020–2024). The 1 ZIP code that serve Foster City hold 35,881 residents in all.
- What is the median household income in Foster City, CA?
- $199,143 inside Foster City city limits, per the Census Bureau. Across its ZIP codes the medians run from $192,332 to $192,332.
- How many carrier routes and mailboxes are in Foster City, CA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 26 carrier routes reaching 15,551 residential and 582 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.