ZIP code 21784
Where is ZIP code 21784?
Sykesville, Maryland
Carroll County · Standard ZIP code
ZIP code 21784 belongs to Sykesville, Maryland in Carroll County. 21784 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 39,258 people live in the 21784 area, where the median household income is $139,395. The closest ZIP codes are 21048 (Finksburg, 4.3 mi northeast), 21157 (Westminster, 7.5 mi north) and 21776 (New Windsor, 8.2 mi northwest).
| ZIP code | 21784 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Sykesville |
| Also accepted | Eldersburg, Gaither |
| State | Maryland (MD) |
| County | Carroll County |
| Time zone | Eastern Time · now |
| Area codes | 410, 443, 667 |
| Coordinates | 39.4567, -76.9696 map |
| 3-digit prefix | 217 |
Population and income in 21784
| Population | 39,258 · higher than 91% of Maryland ZIP codes |
|---|---|
| People per square mile | 699 · higher than 60% of Maryland ZIP codes |
| Median age | 38.9 years · lower than 67% of Maryland ZIP codes |
| Men / women | 50% / 50% |
| Median household income | $139,395 · higher than 75% of Maryland ZIP codes |
| Income per person | $56,974 |
| Below the poverty line | 4.4% |
| Bachelor’s degree or higher | 53% of adults 25+ |
| Median home value | $491,800 · higher than 69% of Maryland ZIP codes |
| Median rent | $1,739 a month |
| Housing units | 13,797 |
| Households | 13,416 (2.84 people on average) |
| Owners / renters | 87% / 13% |
| Land area | 56.13 sq mi (plus 2.03 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21784. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21784
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21048 | Finksburg, MD | 4.3 mi NE | Standard |
| 21157 | Westminster, MD | 7.5 mi N | Standard |
| 21776 | New Windsor, MD | 8.2 mi NW | Standard |
| 21136 | Reisterstown, MD | 8.3 mi E | Standard |
| 21071 | Glyndon, MD | 8.4 mi E | PO Box only |
| 21104 | Marriottsville, MD | 9 mi S | Standard |
| 21797 | Woodbine, MD | 9.2 mi SW | Standard |
| 21723 | Cooksville, MD | 9.6 mi S | Standard |
| 21020 | Boring, MD | 9.9 mi NE | PO Box only |
| 21765 | Lisbon, MD | 9.9 mi SW | PO Box only |
| 21163 | Woodstock, MD | 9.9 mi SE | Standard |
| 21117 | Owings Mills, MD | 10.5 mi E | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21784 or measure the distance to another ZIP code.
How to address mail to 21784
123 MAIN ST
SYKESVILLE MD 21784
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts ELDERSBURG and GAITHER as the city name for 21784. Adding the 4-digit ZIP+4 code (21784-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21784?
- 21784 is a Sykesville, Maryland ZIP code. Eldersburg and Gaither are also accepted as the city name.
- What county is 21784 in?
- ZIP code 21784 is in Carroll County, Maryland.
- What time zone is ZIP code 21784 in?
- 21784 is in the Eastern Time zone (America/New_York).
- What area code is 21784?
- Phone numbers in ZIP code 21784 use area codes 410, 443 and 667.
- What is the population of ZIP code 21784?
- About 39,258 people live in ZIP code 21784, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21784?
- The median household income in 21784 is $139,395 a year, higher than 75% of Maryland ZIP codes.
- What ZIP codes are near 21784?
- The nearest ZIP codes to 21784 are 21048 (Finksburg, 4.3 miles), 21157 (Westminster, 7.5 miles), 21776 (New Windsor, 8.2 miles) and 21136 (Reisterstown, 8.3 miles).