What city is 94939 in?

94939 is a Larkspur, CA mailing address. By land area, 87% lies inside Larkspur and 12% lies inside Kentfield.

What is the population of 94939?

About 7,315 people (±462), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 7,465.

What is the median household income in 94939?

$203,988 (±$51,618), 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 94939?

9 USPS carrier routes with 3,615 residential and 436 business mailboxes (4,051 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 94939?

The closest, measured center to center: 94904 (1.1 mi, Kentfield), 94925 (1.6 mi, Corte Madera), 94957 (2.2 mi, Ross), 94964 (2.5 mi), 94901 (3.5 mi, San Rafael) and 94941 (3.6 mi, Mill Valley).

94939 ZIP Code, Larkspur, CA

94939 is a ZIP code in Larkspur, California in Marin County. It covers 2.4 square miles of land. The closest ZIP codes are 94904, 94925 and 94957. 7,315 people live here in 3,323 households. At about 3,100 people per square mile it has suburban density, and owners and renters are mixed (50% own). Median household income is $203,988, well above the California median of $99,122; the median age is 48.4, older than most ZIP codes.

Quick facts

Mailing city: Larkspur, CA
County: Marin County
Land area: 2.4 sq mi
Population: 7,315
Median household income: $203,988
Carrier routes: 9 (3,615 homes)

Key figures

Measure	Value
Residents	7,315
Households	3,323
Median household income	$203,988
Income per person	$114,426
Median age	48.4
Homeowners	49.8%
Median home value	$2,000,000+
Median rent	$3,278
Bachelor's degree or higher	70.7%
Average commute (minutes)	27.5
Households with kids under 18	25.6%
Moved in the past year	11.3%
Below the poverty line	6.8%
Broadband internet	98.9%
Speak a non-English language at home	12.5%

Household income

% of households	Value
<$10K	5.1%
$10–15K	1.1%
$15–25K	4.9%
$25–35K	4.3%
$35–50K	2.8%
$50–75K	11.1%
$75–100K	6.8%
$100–150K	6.6%
$150–200K	7.0%
$200K+	50.4%

Age

% of all residents	Value
<10	9.9%
10–19	11.3%
20–24	4.2%
25–34	7.7%
35–44	12.6%
45–54	15.1%
55–64	17.8%
65–74	11.9%
75+	9.7%

Tenure

% of housing units	Value
Owned, with mortgage	32.5%
Owned outright	12.7%
Rented	45.2%
Vacant	9.6%

Type of building

% of housing units	Value
Detached house	47.8%
Townhome	5.7%
2–4 units	9.3%
5–19 units	24.6%
20+ units	12.5%
Mobile / other	0.0%

Businesses in 94939

404 business establishments with 5,155 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 79
Finance and Insurance: 61
Real Estate and Rental and Leasing: 46
Health Care and Social Assistance: 39
Retail Trade: 35
Accommodation and Food Services: 35
Other Services (except Public Administration): 32
Construction: 14

EDDM carrier routes

94939 has 9 USPS carrier routes with 3,615 residential and 436 business mailboxes. Open the EDDM route map.

Carrier routes in 94939

94939 has 9 USPS carrier routes (9 city (C)) with 3,615 residential and 436 business mailboxes. Routes range from 238 homes (C025) to 585 homes (C023); the median route has 392 homes. The Census counted 3,323 households in 94939 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	1
250–499	7
500–749	1
750–999	0
1,000–1,499	0
1,500+	0

Best routes in 94939 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C029 — USPS business mailboxes 131, 375 homes
Route C026 — USPS business mailboxes 125, 388 homes
Route C022 — USPS business mailboxes 77, 392 homes
Route C025 — USPS business mailboxes 63, 238 homes
Route C024 — USPS business mailboxes 24, 277 homes

Select these 5 routes on the route map

Every carrier route in 94939

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C021	City	438	0	$190,979	—	—	—
C022	City	392	77	$190,979	—	—	—
C023	City	585	5	$190,979	—	—	—
C024	City	277	24	$200,001+	—	—	—
C025	City	238	63	$127,603	—	—	—
C026	City	388	125	$136,855	—	—	—
C027	City	469	4	$190,979	—	—	—
C028	City	453	7	$151,477	—	—	—
C029	City	375	131	$101,204	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94939 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

94904 — Kentfield CDP, CA (1.1 mi)
94925 — Corte Madera town, CA (1.6 mi)
94957 — Ross town, CA (2.2 mi)
94964 (2.5 mi)
94901 — San Rafael city, CA (3.5 mi)
94941 — Mill Valley city, CA (3.6 mi)
94960 — Sleepy Hollow CDP, CA (4.7 mi)
94930 — Fairfax town, CA (4.8 mi)

Areas that include 94939

Where it ranks

Mail every home in 94939

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) 94939, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94939 in?: 94939 is a Larkspur, CA mailing address. By land area, 87% lies inside Larkspur and 12% lies inside Kentfield.
What county is 94939 in?: 94939 is in Marin County.
What is the population of 94939?: About 7,315 people (±462), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 7,465.
What is the median household income in 94939?: $203,988 (±$51,618), 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 94939?: 9 USPS carrier routes with 3,615 residential and 436 business mailboxes (4,051 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94939?: The closest, measured center to center: 94904 (1.1 mi, Kentfield), 94925 (1.6 mi, Corte Madera), 94957 (2.2 mi, Ross), 94964 (2.5 mi), 94901 (3.5 mi, San Rafael) and 94941 (3.6 mi, Mill Valley).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.