21784 vs 21771 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 21784, Orange = ZIP 21771.
Quick verdict: ZIP 21784 is more affordable rent, lower unemployment, more diverse, more educated, higher work-from-home share. ZIP 21771 is wealthier, higher home values, lower poverty rate.
Quick Facts
ZIP 21784
Eldersburg CDP, MD
View full profile →- Population37,813
- Median Income$141,228
- Median Home Value$478k
- Median Rent$1,588
- Median Age39.5 yrs
- Poverty Rate4.1%
ZIP 21771
Green Valley CDP, MD
View full profile →- Population32,827
- Median Income$154,844
- Median Home Value$532k
- Median Rent$1,873
- Median Age41.4 yrs
- Poverty Rate3.5%
Visual comparison (same scale)
Population
37,81332,827
Median Income
$141,228$154,844
Median Home Value
$478k$532k
Median Rent
$1,588$1,873
Median Age
39.5 yrs41.4 yrs
Poverty Rate
4.1%3.5%
Demographics
ZIP 21784
Eldersburg CDP, MD
View full profile →- White %81.7%
- Black %6.0%
- Asian %4.2%
- Hispanic %5.8%
- Age 0–17 %24.2%
- Age 18–64 %60.5%
- Age 65+ %15.3%
- Bachelor's+ %53.2%
- Diversity Index32/100
ZIP 21771
Green Valley CDP, MD
View full profile →- White %83.8%
- Black %4.5%
- Asian %2.0%
- Hispanic %8.8%
- Age 0–17 %23.3%
- Age 18–64 %61.3%
- Age 65+ %15.4%
- Bachelor's+ %46.1%
- Diversity Index29/100
Visual comparison (same scale)
White %
81.7%83.8%
Black %
6.0%4.5%
Asian %
4.2%2.0%
Hispanic %
5.8%8.8%
Age 0–17 %
24.2%23.3%
Age 18–64 %
60.5%61.3%
Age 65+ %
15.3%15.4%
Bachelor's+ %
53.2%46.1%
Diversity Index
32/10029/100
Economy
ZIP 21784
Eldersburg CDP, MD
View full profile →- Median Income$141,228
- Unemployment %3.5%
- IRS Net Migration+2,222
- Work From Home %20.2%
ZIP 21771
Green Valley CDP, MD
View full profile →- Median Income$154,844
- Unemployment %3.8%
- IRS Net Migration+1,929
- Work From Home %18.7%
Visual comparison (same scale)
Median Income
$141,228$154,844
Unemployment %
3.5%3.8%
IRS Net Migration
+2,222+1,929
Work From Home %
20.2%18.7%
Housing
ZIP 21784
Eldersburg CDP, MD
View full profile →- Median Home Value$478k
- Median Rent$1,588
- Owner Occupied %87.0%
- Broadband %95.7%
- Vacant %3.3%
- Median Year Built1986
ZIP 21771
Green Valley CDP, MD
View full profile →- Median Home Value$532k
- Median Rent$1,873
- Owner Occupied %92.9%
- Broadband %94.0%
- Vacant %4.6%
- Median Year Built1987
Visual comparison (same scale)
Median Home Value
$478k$532k
Median Rent
$1,588$1,873
Owner Occupied %
87.0%92.9%
Broadband %
95.7%94.0%
Vacant %
3.3%4.6%
Median Year Built
19861987
Climate & Location
ZIP 21784
Eldersburg CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)700 ft
- Nearest Airport22.6 miles (36.3 km)
- Distance to Coast19.1 miles (30.7 km)
ZIP 21771
Green Valley CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)700 ft
- Nearest Airport30.4 miles (49.0 km)
- Distance to Coast28.4 miles (45.7 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
700 ft700 ft
Nearest Airport
22.6 miles (36.3 km)30.4 miles (49.0 km)
Distance to Coast
19.1 miles (30.7 km)28.4 miles (45.7 km)
Infrastructure
ZIP 21784
Eldersburg CDP, MD
View full profile →- Work From Home %20.2%
- Walkability (0–100)34
- Broadband %95.7%
ZIP 21771
Green Valley CDP, MD
View full profile →- Work From Home %18.7%
- Walkability (0–100)32
- Broadband %94.0%
Visual comparison (same scale)
Work From Home %
20.2%18.7%
Walkability (0–100)
3432
Broadband %
95.7%94.0%
Frequently Asked Questions
How do ZIP 21784 and 21771 compare?
ZIP 21784 is more affordable rent, lower unemployment, more diverse, more educated, higher work-from-home share. ZIP 21771 is wealthier, higher home values, lower poverty rate.
What do the blue and orange colors mean?
Blue represents the first ZIP (21784), orange the second (21771). The same colors are used in the map markers and comparison bars.
Where does this data come from?
Data is from the U.S. Census Bureau and other federal sources. See our Methodology page for details.
How can I compare other ZIP codes?
From any ZIP page, use the "Compare with Another ZIP" tool, or go to /compare/XXXXX-vs-YYYYY (replace with two 5-digit ZIP codes).
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