Maryland
- ZIP codes
- 605
- Postal place names
- 431
- County associations
- 24
20588–21930 · This is the range of listed codes, not a continuous allocation or a delivery boundary.
Overview
Maryland surrounds much of Chesapeake Bay, stretching from Atlantic beaches through the Piedmont to the Appalachian mountains. Annapolis is the state capital. Other cities include Baltimore, Frederick.
- State capital
- Annapolis
Population overview
- Estimated population
- 6,265,347
- 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
- $103,678
- ACS 2020–2024 · USD 2024
- Median owner-occupied home value
- $419,900
- ACS 2020–2024 · USD 2024
- Median monthly gross rent
- $1,705
- ACS 2020–2024 · USD 2024
- Median age
- 39.4 years
- ACS 2020–2024
Period, uncertainty & data notes
More community indicators
- Households
- 2,362,928
- ACS 2020–2024
- Housing units
- 2,560,784
- ACS 2020–2024
- Residents aged 65+
- 16.7%
- ACS 2020–2024
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.
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): ± 597 USD
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Margin of error (90% confidence): ± 1,385 USD
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Margin of error (90% confidence): ± 8 USD
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Margin of error (90% confidence): ± 0.1 years
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Margin of error (90% confidence): ± 3,782 Households
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Margin of error (90% confidence): ± 424 Housing units
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Margin of error (90% confidence): Not supplied by this source; not zero
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Source & license
U.S. Census Bureau / Census Reporter · ACS 2020–2024 · households & housing units · state · U.S. Census Bureau statistical data — not copyrighted
Successfully checked:
U.S. Census Bureau / Census Reporter · ACS 2020–2024 · state · U.S. Census Bureau statistical data — not copyrighted
Successfully checked:
U.S. Census Bureau / U.S. Environmental Protection Agency · ACS 2020–2024 · state · 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
Page 1 / 11Postal details & data notes
- ZIPs with coordinates
- 605
Common three-digit prefixes
Counts refer to this place; links explore the full prefix nationally. Endpoints do not imply every intervening ZIP exists. Postal names are not a count of incorporated municipalities.
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 ↗