94904 ZIP Code, Greenbrae, CA
94904 is a ZIP code in Greenbrae, California in Marin County. It covers 4.9 square miles of land. The closest ZIP codes are 94939, 94957 and 94925. 12,815 people live here in 5,558 households. At about 2,590 people per square mile it has suburban density, and owners and renters are mixed (63% own). Median household income is $169,118, well above the California median of $99,122; the median age is 50.9, older than most ZIP codes.
Quick facts
- Mailing city: Greenbrae, CA
- County: Marin County
- Land area: 4.9 sq mi
- Population: 12,815
- Median household income: $169,118
- Carrier routes: 12 (5,514 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 12,815 |
| Households | 5,558 |
| Median household income | $169,118 |
| Income per person | $131,960 |
| Median age | 50.9 |
| Homeowners | 62.8% |
| Median home value | $2,000,000+ |
| Median rent | $2,712 |
| Bachelor's degree or higher | 73.5% |
| Average commute (minutes) | 26.6 |
| Households with kids under 18 | 27.0% |
| Moved in the past year | 8.1% |
| Below the poverty line | 5.2% |
| Broadband internet | 94.3% |
| Speak a non-English language at home | 19.1% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.4% |
| $10–15K | 0.6% |
| $15–25K | 1.7% |
| $25–35K | 5.4% |
| $35–50K | 4.8% |
| $50–75K | 10.1% |
| $75–100K | 9.1% |
| $100–150K | 12.1% |
| $150–200K | 8.7% |
| $200K+ | 46.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.2% |
| 10–19 | 12.6% |
| 20–24 | 4.5% |
| 25–34 | 6.1% |
| 35–44 | 8.5% |
| 45–54 | 15.1% |
| 55–64 | 16.4% |
| 65–74 | 11.4% |
| 75+ | 16.1% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 38.4% |
| Owned outright | 20.2% |
| Rented | 34.5% |
| Vacant | 7.0% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 61.0% |
| Townhome | 2.4% |
| 2–4 units | 4.2% |
| 5–19 units | 17.4% |
| 20+ units | 12.6% |
| Mobile / other | 2.5% |
Businesses in 94904
472 business establishments with 5,815 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 130
- Professional, Scientific, and Technical Services: 95
- Real Estate and Rental and Leasing: 45
- Construction: 34
- Retail Trade: 33
- Finance and Insurance: 30
- Other Services (except Public Administration): 26
- Accommodation and Food Services: 19
EDDM carrier routes
94904 has 12 USPS carrier routes with 5,514 residential and 396 business mailboxes. Open the EDDM route map.
Carrier routes in 94904
94904 has 12 USPS carrier routes (12 city (C)) with 5,514 residential and 396 business mailboxes. Routes range from 363 homes (C079) to 784 homes (C074); the median route has 427 homes. The Census counted 5,558 households in 94904 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 9 |
| 500–749 | 2 |
| 750–999 | 1 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 94904 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C076 — USPS business mailboxes 139, 510 homes
- Route C083 — USPS business mailboxes 98, 377 homes
- Route C088 — USPS business mailboxes 94, 440 homes
- Route C081 — USPS business mailboxes 47, 404 homes
- Route C070 — USPS business mailboxes 13, 418 homes
Select these 5 routes on the route map
Every carrier route in 94904
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C070 | City | 418 | 13 | $200,001+ | — | — | — |
| C072 | City | 436 | 0 | $200,001+ | — | — | — |
| C074 | City | 784 | 1 | $107,496 | — | — | — |
| C075 | City | 385 | 1 | $200,001+ | — | — | — |
| C076 | City | 510 | 139 | $61,620 | — | — | — |
| C079 | City | 363 | 0 | $200,001+ | — | — | — |
| C081 | City | 404 | 47 | $200,001+ | — | — | — |
| C083 | City | 377 | 98 | $135,706 | — | — | — |
| C086 | City | 436 | 0 | $200,001+ | — | — | — |
| C087 | City | 401 | 2 | $200,001+ | — | — | — |
| C088 | City | 440 | 94 | $200,001+ | — | — | — |
| C089 | City | 560 | 1 | $107,496 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94904 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 94939 — Larkspur city, CA (1.1 mi)
- 94957 — Ross town, CA (1.2 mi)
- 94925 — Corte Madera town, CA (2.6 mi)
- 94941 — Mill Valley city, CA (3.1 mi)
- 94964 (3.4 mi)
- 94901 — San Rafael city, CA (3.6 mi)
- 94960 — Sleepy Hollow CDP, CA (3.7 mi)
- 94930 — Fairfax town, CA (3.8 mi)
Areas that include 94904
- Larkspur, CA ZIP codes — 2 ZIP codes
- Kentfield, CA ZIP codes — 2 ZIP codes
- Greenbrae, CA ZIP codes — 1 ZIP code
- Marin County ZIP codes — 29 ZIP codes
- California ZIP code data
Where it ranks
Mail every home in 94904
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 94904, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 94904 in?
- 94904 is a Greenbrae, CA mailing address. By land area, 55% lies inside Kentfield and 15% lies inside Larkspur; the rest is outside any Census-defined city or community.
- What county is 94904 in?
- 94904 is in Marin County.
- What is the population of 94904?
- About 12,815 people (±733), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,718.
- What is the median household income in 94904?
- $169,118 (±$23,868), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 94904?
- 12 USPS carrier routes with 5,514 residential and 396 business mailboxes (5,910 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 94904?
- The closest, measured center to center: 94939 (1.1 mi, Larkspur), 94957 (1.2 mi, Ross), 94925 (2.6 mi, Corte Madera), 94941 (3.1 mi, Mill Valley), 94964 (3.4 mi) and 94901 (3.6 mi, San Rafael).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.