Zip Code 21015 — Bel Air, MD
21015 is a ZIP Code associated with Bel Air, MD, located within Harford. 21015 ranks #3 out of 20 ZIP codes in Harford County by population (and #86 out of 477 in MD). The area supports an estimated population of 30,013 residents across Data Pending housing units, with a population density of 370.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.546910, -76.296190)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 21015 |
| Primary City | Bel Air |
| State / Province | MD |
| County | Harford |
| Total Population | 30,013 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 370.8 people/sq mi |
| Timezone | America/New_York |
How 21015 Compares
| Metric | ZIP 21015 | Harford County | MD State Average |
|---|
| Population | 30,013 | 262,768 (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 370.8 /sq mi | -- | -- |
| County Pop Rank | #3 of 20 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →