State profile · MD
Maryland ZIP Codes
Demographics, income, and housing across every ZIP code in Maryland, benchmarked against all 50 states, DC and Puerto Rico.
- 468
- ZIP codes
- 5,773,561
- Population
- $114,125
- Avg ZIP income
- 24
- Counties
The verdict
Texas leads ZIP coverage at 1,935 ZCTAs (#1 of 52). That is not the income board: New Jersey's unweighted average ZIP household income is $121,992 (#1 of 52) on 595 ZCTAs. Maryland sits #30 of 52 by ZIP count at income #4.
- Texas
- ZIP-count #1 (1,935)
- New Jersey
- income #1 ($121,992)
- #30
- of 52 by ZIP count
- #4
- of 52 by avg income
ZIP-count and income are separate boards among 52 reporting states and territories. Income is the unweighted mean of each ZIP's ACS 2019–2023 median household income, so a rural code counts the same as a dense metro.
A high-income state on a compact ZIP set (468 codes · 24 counties): average household income $114,125 and home value $447,459 usually track the largest city more tightly than in mosaic states. Median age sits near 43.4. Skip mega-state synthesis; jump from this profile into the top city and its primary ZIP for the street-level read.
Population is dispersed across many cities (largest share ~11% in Baltimore). No single metro owns the narrative: scan the largest-cities chart for several peers, then pick counties from different regions before drilling to ZIP detail. Unweighted ZIP averages are especially noisy on this dispersed map.
Compact ZIP geography: the state page is closer to a directory than a mega-atlas. Prefer the largest city page and its primary ZIP over scanning every county, and keep the FAQ answers as the quick census totals.
Largest cities in Maryland
Top 10 cities by population in Maryland
Total resident population aggregated from every ZIP code the Census assigns to each city.
- Baltimore
Baltimore, MD
632,623 residents
- Silver Spring
Silver Spring, MD
282,095 residents
- Hyattsville 150,988
Hyattsville, MD
150,988 residents
- Gaithersburg 135,332
Gaithersburg, MD
135,332 residents
- Rockville 130,569
Rockville, MD
130,569 residents
- Frederick 120,323
Frederick, MD
120,323 residents
- Laurel 102,149
Laurel, MD
102,149 residents
- Bowie 95,216
Bowie, MD
95,216 residents
- Hagerstown 95,186
Hagerstown, MD
95,186 residents
- Columbia 95,072
Columbia, MD
95,072 residents
What this shows No single metro owns Maryland: the top-10 cities share the map, and most of the 395 places are far smaller – use several peers before drilling to ZIP detail.
Counties in Maryland
Which cities have the most ZIPs in Maryland?
Side-by-side: Compare 21234 vs 20906 →
ZIP Codes in Maryland
More MD ZIP codes
Official Data Resources for Maryland
Compact ZIP geography: start at Census ACS for Maryland, then BLS wages for the labor-market side of the same small map.
Frequently Asked Questions
Is Maryland compact enough to browse ZIP by ZIP?
Yes – 468 codes and 24 counties put Maryland in compact geography. Prefer the largest city page and its primary ZIP; the roll-ups here are quick census totals, not a substitute for opening one urban and one thin-edge code.
Does Maryland's above-median ZIP income mean every market is expensive?
No. The unweighted ZIP mean ($114,125) still mixes dense suburbs with thinner edges, and home values average $447,459. Open the densest metro and one thin-edge county before reading affordability from the state line alone.
Why doesn't one city define Maryland?
Population is dispersed (largest share ~11% in Baltimore). Scan several peers on the largest-cities chart, then pick counties from different regions before drilling to ZIP detail – unweighted ZIP averages are especially noisy on a dispersed map.
Take this with you
What to do with Maryland's numbers, next.
- See how Maryland compares to a neighboring state on the same Census fields Compare states
- Check where Maryland's ZIP codes rank nationally on income, education, or homeownership View national rankings
- Save a ZIP code to your shortlist to track alongside others you're considering View your shortlist
Figures describe 2019–2023 ACS 5-Year Estimates aggregated from ZIP Code Tabulation Areas (ZCTAs), Census Bureau approximations of USPS ZIP codes, not any single address.
Source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019–2023); USPS ZIP Code Tabulation Areas via the HUD USPS Crosswalk.
Read our methodology to see how this data is sourced, computed, and verified.