| ZIP Codes: | 41 ZIP Codes (34 Standard, 5 PO Box, 2 Unique) [See All] |
| Area Codes: | 227 / 240 / 301 / 410 / 443 / 667 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:28 PM |
| Population: | 554,835 [See All] |
| FIPS: | 24003 |
| CBSA: | Baltimore-Columbia-Towson, MD |
| Land Area: | 436 sq mi |
| Water Area: | 59 sq mi |
| Coordinates: | 39.0032, -76.5836 |
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554,835 residents live across 41 ZIPs covering 436 sq mi, served by 31 distinct USPS-recognized cities.
Population moved from 518,786 to 554,835 from 2014 to 2024 — a +6.9% change. 22 ZIPs gained residents, 12 lost (and 1 held flat).
The county's wealthiest ZIP 20778 (West River, $205,974 median) and poorest ZIP 21402 (Annapolis, $80,893) are 11.5 miles apart — a 2.5× income gap across local geography.
Median home values vary 2.5× across this county — from $330,500 in 21226 (Curtis Bay) to $831,500 in 21035 (Davidsonville).
Density varies 33× across the county — from 144 people/sq mi in 20776 (Harwood) to 4,750 in 21061 (Glen Burnie).
Educational attainment ranges from 25.0% bachelor's+ in 21061 (Glen Burnie) to 63.0% in 21114 (Crofton) — the breadth of educational profiles across the area.
Within Maryland, this is the #5 most populous of 24 counties and ranks #3 for median household income with the #6 fastest decade growth .
On the national stage, Anne Arundel County is ranks #26 for income .
Hosts 2 single-entity Unique ZIPs: 21411Comptroller Of The Treasury ; and 21062Md Motor Vehicle Admin .
Weighted by population, the typical household earns about $129,312 across the county — reflecting what a typical resident sees, not a simple ZIP average.
46.4% of adults age 25+ hold a bachelor's degree or higher (178,254 of 383,953 reporting).
34 Standard delivery, 5 PO Box only, 2 single-entity Unique ZIPs serve this county.
4 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 21122 | Pasadena | Standard | 61,566 | $127,587 | 40.1 | 1.9% |
| 21061 | Glen Burnie | Standard | 57,230 | $87,751 | 12.0 | 4.0% |
| 21060 | Glen Burnie | Standard | 39,730 | $104,715 | 14.4 | 28.5% |
| 21401 | Annapolis | Standard | 38,629 | $123,381 | 22.3 | 3.1% |
| 21144 | Severn | Standard | 37,118 | $136,684 | 16.8 | 14.3% |
| 21113 | Odenton | Standard | 36,705 | $125,639 | 15.0 | 14.7% |
| 21403 | Annapolis | Standard | 32,681 | $123,329 | 11.6 | 7.3% |
| 21146 | Severna Park | Standard | 28,591 | $172,122 | 12.9 | 4.2% |
| 21114 | Crofton | Standard | 25,590 | $141,344 | 5.6 | -2.2% |
| 21012 | Arnold | Standard | 22,570 | $139,432 | 12.4 | 6.0% |
| 21037 | Edgewater | Standard | 20,854 | $145,787 | 20.7 | -0.3% |
| 21409 | Annapolis | Standard | 20,289 | $147,151 | 15.3 | 0.7% |
| 20724 | Laurel | Standard | 19,369 | $118,115 | 14.5 | 13.9% |
| 21108 | Millersville | Standard | 18,643 | $151,324 | 13.3 | 5.6% |
| 21054 | Gambrills | Standard | 16,386 | $163,825 | 17.0 | 60.9% |
| 20755 | Fort George G Meade | Standard | 11,225 | $103,261 | 10.5 | 14.4% |
| 21090 | Linthicum Heights | Standard | 10,652 | $138,119 | 6.9 | 7.3% |
| 21032 | Crownsville | Standard | 8,850 | $168,653 | 19.1 | -1.2% |
| 21035 | Davidsonville | Standard | 7,879 | $188,347 | 29.9 | -4.5% |
| 20711 | Lothian | Standard | 7,731 | $113,576 | 35.3 | 17.4% |
| 21226 | Curtis Bay | Standard | 6,674 | $82,635 | 18.8 | -14.1% |
| 21140 | Riva | Standard | 4,417 | $170,156 | 1.9 | 30.4% |
| 21402 | Annapolis | Standard | 4,303 | $80,893 | 2.8 | -26.8% |
| 20776 | Harwood | Standard | 3,315 | $149,300 | 23.1 | -0.7% |
| 20764 | Shady Side | Standard | 2,993 | $118,857 | 4.4 | -36.9% |
| 20751 | Deale | Standard | 2,851 | $123,951 | 5.2 | 23.2% |
| 20733 | Churchton | Standard | 2,669 | $126,797 | 3.7 | -2.8% |
| 20778 | West River | Standard | 2,211 | $205,974 | 8.3 | 4.6% |
| 20779 | Tracys Landing | Standard | 883 | $178,452 | 6.9 | -32.8% |
| 20758 | Friendship | Standard | 714 | $240,847 | 4.8 | 46.9% |
| 20765 | Galesville | PO Box | 668 | $149,545 | 0.7 | 15.6% |
| 21405 | Annapolis | Standard | 495 | $160,703 | 1.9 | -14.1% |
| 21056 | Gibson Island | PO Box | 291 | $250,001 | 3.6 | 16.9% |
| 21077 | Harmans | Standard | 63 | — | 0.4 | -62.0% |
| 21240 | Baltimore | Standard | 0 | — | 4.6 | — |
| 21062 | Glen Burnie | Unique | — | — | 0.0 | — |
| 21123 | Pasadena | PO Box | — | — | 0.0 | — |
| 21106 | Mayo | PO Box | — | — | 0.0 | — |
| 21404 | Annapolis | PO Box | — | — | 0.0 | — |
| 21411 | Annapolis | Unique | — | — | 0.0 | — |
| 21412 | Annapolis | Standard | — | — | 0.0 | — |