94583 ZIP Code, San Ramon, CA

94583 is a ZIP code in San Ramon, California in Contra Costa County. It covers 21 square miles of land. The closest ZIP codes are 94526, 94582 and 94552. 39,583 people live here in 13,890 households. At about 1,864 people per square mile it has suburban density, and most homes are owner-occupied (72%). Median household income is $184,898, well above the California median of $99,122; 41% of households have children under 18.

Quick facts

Key figures

MeasureValue
Residents39,583
Households13,890
Median household income$184,898
Income per person$79,629
Median age40.8
Homeowners72.1%
Median home value$1,383,600
Median rent$3,019
Bachelor's degree or higher64.9%
Average commute (minutes)33.1
Households with kids under 1840.8%
Moved in the past year10.3%
Below the poverty line3.6%
Broadband internet96.0%
Speak a non-English language at home37.4%

Household income

% of householdsValue
<$10K1.9%
$10–15K1.2%
$15–25K1.2%
$25–35K3.1%
$35–50K2.1%
$50–75K7.6%
$75–100K4.9%
$100–150K17.3%
$150–200K15.1%
$200K+45.6%

Age

% of all residentsValue
<1012.2%
10–1914.9%
20–245.1%
25–349.3%
35–4414.9%
45–5415.9%
55–6413.4%
65–747.8%
75+6.5%

Tenure

% of housing unitsValue
Owned, with mortgage51.4%
Owned outright18.5%
Rented26.9%
Vacant3.2%

Type of building

% of housing unitsValue
Detached house66.6%
Townhome10.7%
2–4 units5.1%
5–19 units9.9%
20+ units7.7%
Mobile / other0.0%

Businesses in 94583

2,090 business establishments with 36,442 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

94583 has 24 USPS carrier routes with 14,426 residential and 1,937 business mailboxes. Open the EDDM route map.

Carrier routes in 94583

94583 has 24 USPS carrier routes (24 city (C)) with 14,426 residential and 1,937 business mailboxes. Routes range from 126 homes (C011) to 1,329 homes (C012); the median route has 578 homes. The Census counted 13,890 households in 94583 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–4997
500–74913
750–9992
1,000–1,4991
1,500+0

Best routes in 94583 for…

Most businesses

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

  1. Route C011 — USPS business mailboxes 501, 126 homes
  2. Route C023 — USPS business mailboxes 409, 370 homes
  3. Route C027 — USPS business mailboxes 402, 521 homes
  4. Route C010 — USPS business mailboxes 228, 684 homes
  5. Route C054 — USPS business mailboxes 173, 425 homes

Select these 5 routes on the route map

Every carrier route in 94583

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C003City4911$178,316———
C005City4840$200,001+———
C006City4891$180,761———
C007City6431$200,001+———
C008City65048$200,001+———
C010City684228$187,620———
C011City126501$172,399———
C012City1,32931$200,001+———
C013City5770$200,001+———
C016City5040$178,316———
C018City5210$162,080———
C020City96912$200,001+———
C022City5781$200,001+———
C023City370409$160,416———
C024City65012$200,001+———
C025City6690$200,001+———
C026City65239$200,001+———
C027City521402$137,241———
C029City5942$178,316———
C044City43744$200,001+———
C049City4961$200,001+———
C054City425173$200,001+———
C055City96631$187,620———
C056City6010$185,092———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 94583 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

Areas that include 94583

Where it ranks

Mail every home in 94583

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) 94583, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 94583 in?
94583 is a San Ramon, CA mailing address. By land area, 39% lies inside San Ramon and 17% lies inside Norris Canyon; the rest is outside any Census-defined city or community.
What county is 94583 in?
94583 is in Contra Costa County.
What is the population of 94583?
About 39,583 people (±1,513), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 38,444.
What is the median household income in 94583?
$184,898 (±$9,278), 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 94583?
24 USPS carrier routes with 14,426 residential and 1,937 business mailboxes (16,365 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 94583?
The closest, measured center to center: 94526 (3 mi, Danville), 94582 (4.1 mi, San Ramon), 94552 (4.7 mi, Castro Valley), 94528 (5.1 mi, Diablo), 94506 (5.3 mi, Blackhawk) and 94507 (5.8 mi, Alamo).

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