ZIP Code 94521, California
ZIP Code 94521 profile, demographic data, and geographic information.
ZCTA5 94521 is a 5-digit ZIP Code area located in Contra Costa County, California. As of official census estimates, it has a reported population of 41,909. The land area covers 9.68 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 41,909 | ±1,800 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 42.9 yrs | ±1.3 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 15,938 | ±660 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 16,451 | ±649 |
| Occupied Housing Units | 15,938 | ±660 |
| Vacant Housing Units | 513 | ±168 |
| Median Home Value | $853,200 | ±$15,179 |
| Median Gross Rent | $2,404 | ±$120 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $125,899 | ±$6,693 |
| Per Capita Income | $59,781 | ±$2,638 |
| Poverty Rate | 5.2% | ±1% |
| Population Below Poverty Level | 2,170 | ±439 |
| Unemployment Rate | 6.1% | ±1.3% |
| Civilian Labor Force, Employed | 21,603 | ±1,155 |
| Broadband Internet Rate | 96.9% | ±0.6% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 1,172,607 (2024)
ID: 161097
|
County | Official County Government |
Contact: CHAIRMAN
651 PINE ST, RM 108A, MARTINEZ CA 94553-1229
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | KG-05 | Oakland, CA | |
| Regular School Nearby | 09-12 | Oakland, CA | |
| Regular School Nearby | KG-08 | Oakland, CA | |
| Alternative School Nearby | 09-12 | Walnut Creek, CA | |
| Regular School Nearby | 09-12 | Lafayette, CA | |
| Regular School Nearby | KG-05 | Oakland, CA | |
| Regular School Nearby | 06-08 | Brentwood, CA | |
| Regular School Nearby | KG-05 | Alamo, CA | |
| Regular School Nearby | 09-12 | Martinez, CA | |
| Regular School Nearby | KG-05 | Oakland, CA |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Mt. Diablo Adult Education-Mt. Diablo USD
|
College Vocational | 3.3 mi away | Loma Vista Adult Center - 1266 San Carlos Avenue., Concord, CA, 94518-1199 |
9256857340
|
|
CLAYTON COMMUNITY LIBRARY
|
Library | 2.0 mi away | 6125 CLAYTON ROAD, CLAYTON, CA, 94517 |
(925) 673-0659
|
|
Urban Barber College
|
College Vocational | 4.1 mi away | 1809 Willow Pass Rd, Concord, CA, 94520-2522 |
9256710121
|
|
YGNACIO VALLEY LIBRARY
|
Library | 3.0 mi away | 2661 OAK GROVE RD., WALNUT CREEK, CA, 94598 |
(925) 938-1481
|
|
Unitek College - Concord
|
College | 4.6 mi away | 1401 Willow Pass Road, Concord, CA, 94520-7982 | — |
|
CONCORD LIBRARY
|
Library | 3.6 mi away | 2900 SALVIO STREET, CONCORD, CA, 94519 |
(925) 646-5455
|
|
Paul Mitchell the School-East Bay
|
College Vocational | 5.0 mi away | 100 Crescent Dr., Suite D, Pleasant Hill, CA, 94523 |
9256917687
|
|
PLEASANT HILL LIBRARY
|
Library | 5.5 mi away | 2 MONTICELLO AVE., PLEASANT HILL, CA, 94523 |
(925) 646-6434
|
|
Carrington College-Pleasant Hill Campus
|
College | 5.6 mi away | 380 Civic Drive, Suite 300, Pleasant Hill, CA, 94523-1984 |
9252733922650
|
|
BAY POINT LIBRARY
|
Library | 5.6 mi away | 205 PACIFICA AVENUE, BAY POINT, CA, 94565 |
(925) 458-9597
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at CONCORD BUCHANAN FLD, CA US, located 5.4 miles from ZCTA5 94521. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 57.6° | 41.2° | 49.4° | 3.21" | — |
| February | 62.1° | 43.8° | 53.0° | 3.19" | — |
| March | 66.7° | 46.6° | 56.6° | 2.26" | — |
| April | 71.2° | 49.1° | 60.1° | 1.12" | — |
| May | 77.5° | 53.0° | 65.3° | 0.51" | — |
| June | 84.2° | 57.1° | 70.6° | 0.16" | — |
| July | 88.0° | 58.7° | 73.4° | 0.00" | — |
| August | 87.9° | 59.4° | 73.6° | 0.02" | — |
| September | 85.3° | 57.8° | 71.6° | 0.06" | — |
| October | 78.1° | 52.6° | 65.4° | 0.73" | — |
| November | 66.1° | 45.2° | 55.6° | 1.61" | — |
| December | 58.2° | 40.7° | 49.5° | 3.18" | — |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Concord city | City | 2.2 mi | — |
| Clayton city | City | 2.3 mi | — |
| North Gate CDP | CDP | 3.6 mi | — |
| Shell Ridge CDP | CDP | 4.8 mi | — |
| Contra Costa Centre CDP | CDP | 5.0 mi | — |
| Walnut Creek city | City | 5.2 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 94521. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.