Zip Code 21034 — Darlington, MD
21034 is a ZIP Code associated with Darlington, MD, located within Harford. 21034 ranks #16 out of 20 ZIP codes in Harford County by population (and #282 out of 477 in MD). The area supports an estimated population of 2,846 residents across Data Pending housing units, with a population density of 41.2 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.649050, -76.222610)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 21034 |
| Primary City | Darlington |
| State / Province | MD |
| County | Harford |
| Total Population | 2,846 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 41.2 people/sq mi |
| Timezone | America/New_York |
How 21034 Compares
| Metric | ZIP 21034 | Harford County | MD State Average |
|---|
| Population | 2,846 | 262,768 (Total) | 6,205,597 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 41.2 /sq mi | -- | -- |
| County Pop Rank | #16 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 →