Checked
ZIP Code 21784
Eldersburg, MD, Carroll County
Population
39,258
Land area
56.1sq mi
People per sq mi
699
City
Eldersburg
ZIP 21784 and nearby ZIP codes
ZIP 21784 at a glance
- The median household income is $139,395, 34% above the Maryland median of $103,678.
- A typical owner-occupied home is valued at $491,800 (17% above Maryland) and median rent is $1,739 a month.
Local data for ZIP 21784
Counts from official public data
Housing and community stats
ZIP 21784, American Community Survey 2020-2024
Median household income
$139,395
Poverty rate
4.4%
Median home value
$491,800
Prices +3.1% in a year
Median rent
$1,739/mo
Homeownership
87.3%
Bachelor's or higher
53.0%
Median age
38.9
Average commute
33.3 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
975
ZIP Business Patterns 2023
Employees
12,994
$662M annual payroll
PPP loans
$87.49M
958 loans
Campaign donations
$164K
27% D, 36% R, 2026 cycle
Environment and hazard risk
ZIP 21784, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: strong wind
Storm events since 1996
1,083
Countywide, mostly thunderstorm wind
Flood insurance policies
177
0.3% of homes, county
July high / Jan low
84° / 25°F
47.9 inches of rain a year
Health statistics
Share of adults in ZIP 21784, CDC PLACES estimates
Obesity
36.3%
U.S. 33.3% +3.0 pts
Diabetes
9.5%
U.S. 12.1% -2.6 pts
Smoking
9.5%
U.S. 12.8% -3.3 pts
Uninsured (18-64)
5.4%
U.S. 11.1% -5.7 pts
Cities in ZIP 21784
ZIP codes near 21784
| Name | Distance | Land area (sq mi) |
|---|---|---|
| 21104Sykesville | 4.8 mi | 17.1 |
| 21797Lisbon | 5.3 mi | 43.7 |
| 21723Lisbon | 5.5 mi | 3.6 |
| 21794Sykesville | 6.9 mi | 8.2 |
| 21163Randallstown | 7.4 mi | 13.6 |
| 21048Eldersburg | 7.7 mi | 27.3 |
| 21738Lisbon | 8.1 mi | 7 |
| 21133Randallstown | 8.5 mi | 9 |
| 21042Ellicott City | 9.2 mi | 37 |
| 21737Brookeville | 9.9 mi | 5.1 |
| 21771Mount Airy | 10 mi | 89.5 |
| 21071Reisterstown | 10 mi | 1.5 |
Frequently asked questions
- What city is ZIP code 21784?
- ZIP code 21784 is in Eldersburg, MD (Carroll County).
- What county is ZIP code 21784 in?
- ZIP code 21784 is mostly in Carroll County, Maryland.
- How many people live in ZIP code 21784?
- About 39,258 people live in the 21784 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.