ZIP code 21010
Where is ZIP code 21010?
Gunpowder, Maryland
Harford County · Standard ZIP code
ZIP code 21010 belongs to Gunpowder, Maryland in Harford County. 21010 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 410, 443 and 667. About 239 people live in the 21010 area, where the median household income is $99,410. The closest ZIP codes are 21040 (Edgewood, 2.6 mi northwest), 21085 (Joppa, 4.6 mi northwest) and 21009 (Abingdon, 5.4 mi north).
| ZIP code | 21010 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Gunpowder |
| Also accepted | Aber Prov Grd, Aberdeen Proving Ground |
| State | Maryland (MD) |
| County | Harford County |
| Time zone | Eastern Time · now |
| Area codes | 410, 443, 667 |
| Coordinates | 39.3982, -76.2743 map |
| 3-digit prefix | 210 |
Population and income in 21010
| Population | 239 · lower than 90% of Maryland ZIP codes |
|---|---|
| People per square mile | 33 · lower than 94% of Maryland ZIP codes |
| Median age | 19.3 years · lower than 100% of Maryland ZIP codes |
| Men / women | 63% / 37% |
| Median household income | $99,410 · lower than 55% of Maryland ZIP codes |
| Income per person | $28,745 |
| Below the poverty line | 0.0% |
| Bachelor’s degree or higher | 69% of adults 25+ |
| Median rent | $3,147 a month |
| Housing units | 117 |
| Households | 55 (4.35 people on average) |
| Owners / renters | 0.0% / 100% |
| Land area | 7.25 sq mi (plus 0.05 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21010. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21010
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21040 | Edgewood, MD | 2.6 mi NW | Standard |
| 21085 | Joppa, MD | 4.6 mi NW | Standard |
| 21009 | Abingdon, MD | 5.4 mi N | Standard |
| 21017 | Belcamp, MD | 5.6 mi N | Standard |
| 21027 | Chase, MD | 5.7 mi SW | PO Box only |
| 21130 | Perryman, MD | 6.1 mi NE | PO Box only |
| 21156 | Upper Falls, MD | 7.1 mi W | Standard |
| 21162 | White Marsh, MD | 7.4 mi W | Standard |
| 21087 | Kingsville, MD | 8.5 mi NW | Standard |
| 21220 | Middle River, MD | 8.5 mi SW | Standard |
| 21001 | Aberdeen, MD | 9.3 mi NE | Standard |
| 21015 | Bel Air, MD | 9.4 mi N | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21010 or measure the distance to another ZIP code.
How to address mail to 21010
123 MAIN ST
GUNPOWDER MD 21010
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts ABER PROV GRD and ABERDEEN PROVING GROUND as the city name for 21010. Avoid Edgewood Arsenal: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (21010-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21010?
- 21010 is a Gunpowder, Maryland ZIP code. Aber Prov Grd and Aberdeen Proving Ground are also accepted as the city name.
- What county is 21010 in?
- ZIP code 21010 is in Harford County, Maryland.
- What time zone is ZIP code 21010 in?
- 21010 is in the Eastern Time zone (America/New_York).
- What area code is 21010?
- Phone numbers in ZIP code 21010 use area codes 410, 443 and 667.
- What is the population of ZIP code 21010?
- About 239 people live in ZIP code 21010, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21010?
- The median household income in 21010 is $99,410 a year, lower than 55% of Maryland ZIP codes.
- What ZIP codes are near 21010?
- The nearest ZIP codes to 21010 are 21040 (Edgewood, 2.6 miles), 21085 (Joppa, 4.6 miles), 21009 (Abingdon, 5.4 miles) and 21017 (Belcamp, 5.6 miles).