Contra Costa, California
- ZIP codes
- 52
- Postal place names
- 30
94505–94850 · This is the range of listed codes, not a continuous allocation or a delivery boundary.
Overview
Contra Costa is a county-level name in the California postal directory. Associated postal places include Concord, Richmond, Walnut Creek.
Regional context
- State / postal region
- California
- Associated postal places
- ConcordRichmondWalnut Creek
Population overview
- Estimated population
- 1,170,070
- Reference year
- 2025
Population of the matched statistical area, not a ZIP delivery area.
Community snapshot
Estimates for the matched Census geography; not a sum of ZIPs.
- Median household income
- $127,229
- ACS 2020–2024 · USD 2024
- State reference · CA
$99,122 - Median owner-occupied home value
- $866,800
- ACS 2020–2024 · USD 2024
- State reference · CA
$734,700 - Median monthly gross rent
- $2,375
- ACS 2020–2024 · USD 2024
- State reference · CA
$2,036 - Median age
- 40.5 years
- ACS 2020–2024
- State reference · CA
37.9 years
Period, uncertainty & data notes
More community indicators
- Households
- 414,417
- ACS 2020–2024
- State reference · CA
13,548,091 - Housing units
- 429,260
- ACS 2020–2024
- State reference · CA
14,644,735 - Residents aged 65+
- 17.1%
- ACS 2020–2024
- State reference · CA
15.7% - Households with housing cost burden
- 23.9%
- ACS 2017–2021
- Households without broadband
- 6.0%
- ACS 2017–2021
ACS five-year survey estimates; not live data. Each measure retains its own period and denominator. Income is in the final year’s inflation-adjusted US dollars. Missing is not zero.
Same-period state estimates are context, not a statistical significance test or a rating.
Home values describe owner-occupied homes, not recent sale prices. Gross rent is monthly and includes applicable utilities; it is not advertised rent.
Households include family and nonfamily households and correspond to occupied housing units. Housing units also include vacant units. Neither counts people, postal addresses or homes for sale; do not add overlapping areas.
Selected fields; unavailable codes normalized to missing. No endorsement implied.
Margin of error (90% confidence): ± 1,713 USD
State reference · CA · 2020–2024 · Margin of error (90% confidence): ± 310.0 · U.S. Census Bureau / Census Reporter · ACS 2020–2024 · state
Content changed:
Margin of error (90% confidence): ± 6,426 USD
State reference · CA · 2020–2024 · Margin of error (90% confidence): ± 1307.0 · U.S. Census Bureau / Census Reporter · ACS 2020–2024 · state
Content changed:
Margin of error (90% confidence): ± 22 USD
State reference · CA · 2020–2024 · Margin of error (90% confidence): ± 5.0 · U.S. Census Bureau / Census Reporter · ACS 2020–2024 · state
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Margin of error (90% confidence): ± 0.1 years
State reference · CA · 2020–2024 · Margin of error (90% confidence): ± 0.1 · U.S. Census Bureau / Census Reporter · ACS 2020–2024 · state
Content changed:
Margin of error (90% confidence): ± 1,118 Households
State reference · CA · 2020–2024 · Margin of error (90% confidence): ± 17724.0 · U.S. Census Bureau / Census Reporter · ACS 2020–2024 · households & housing units · state
Content changed:
Margin of error (90% confidence): ± 163 Housing units
State reference · CA · 2020–2024 · Margin of error (90% confidence): ± 1665.0 · U.S. Census Bureau / Census Reporter · ACS 2020–2024 · households & housing units · state
Content changed:
Margin of error (90% confidence): Not supplied by this source; not zero
State reference · CA · 2020–2024 · Margin of error (90% confidence): Not supplied by this source; not zero · U.S. Census Bureau / U.S. Environmental Protection Agency · ACS 2020–2024 · state
Content changed:
Margin of error (90% confidence): ± 0.7 percentage points
Content changed:
Margin of error (90% confidence): ± 0.4 percentage points
Content changed:
Source & license
U.S. Census Bureau / CDC · ACS 2017–2021 · county · CDC Use of Agency Materials
Successfully checked:
U.S. Census Bureau / Census Reporter · ACS 2020–2024 · households & housing units · county · U.S. Census Bureau statistical data — not copyrighted
Successfully checked:
U.S. Census Bureau / Census Reporter · ACS 2020–2024 · county · U.S. Census Bureau statistical data — not copyrighted
Successfully checked:
U.S. Census Bureau / U.S. Environmental Protection Agency · ACS 2020–2024 · county · US EPA Data Licensing Agreement for public use
Successfully checked:
These statistical data are also available free from the linked sources. Use of the data or source links does not imply endorsement of ZIPSFIELD by the Census Bureau, CDC, HHS or the U.S. Government.
Map & location
State statistics layer
State-level values, not ZIP-level values. Equal-width color bands; gray means unavailable. Select a state for details.
View all · State / postal region
| State / postal region | Indicator | Margin of error (90% confidence) |
|---|
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Dots summarize approximate ZIP locations grouped by state and three-digit prefix; they are not official delivery boundaries. Colors follow the first digit. Not every number in a displayed range is assigned. Alaska and island insets are relocated and use different scales.
Locations use available coordinates, not delivery boundaries. The simplified world outline may omit small islands; postal associations do not imply administrative ownership.
County outlines are simplified 2017 Census reference geography, not current legal or ZIP delivery boundaries. Highlighting follows postal associations.
No reliable coordinates are available for this postal region.
ZIP directory
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ZIP codes organize mail delivery, not administrative boundaries. A code can have several city or county associations. Coordinates are approximate; verify delivery addresses with your carrier. Read the guide ↗