20625 vs 20621 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 20625, Orange = ZIP 20621.
Quick verdict: ZIP 20625 is wealthier, lower poverty rate. ZIP 20621 is higher home values, lower unemployment, more diverse, more educated, higher work-from-home share.
Quick Facts
ZIP 20625
Cobb Island CDP, MD
View full profile →- Population1,135
- Median Income$161,000
- Median Home Value$244k
- Median Age45.2 yrs
- Poverty Rate1.9%
ZIP 20621
MD
View full profile →- Population902
- Median Income$0
- Median Home Value$563k
- Median Age60.2 yrs
- Poverty Rate12.2%
Visual comparison (same scale)
Population
1,135902
Median Income
$161,000$0
Median Home Value
$244k$563k
Median Age
45.2 yrs60.2 yrs
Poverty Rate
1.9%12.2%
Demographics
ZIP 20625
Cobb Island CDP, MD
View full profile →- White %96.0%
- Black %0.0%
- Asian %1.8%
- Hispanic %0.0%
- Age 0–17 %16.9%
- Age 18–64 %83.1%
- Age 65+ %0.0%
- Bachelor's+ %4.5%
- Diversity Index8/100
ZIP 20621
MD
View full profile →- White %92.5%
- Black %7.5%
- Asian %0.0%
- Hispanic %0.0%
- Age 0–17 %7.4%
- Age 18–64 %68.4%
- Age 65+ %24.2%
- Bachelor's+ %8.5%
- Diversity Index14/100
Visual comparison (same scale)
White %
96.0%92.5%
Black %
0.0%7.5%
Asian %
1.8%0.0%
Hispanic %
0.0%0.0%
Age 0–17 %
16.9%7.4%
Age 18–64 %
83.1%68.4%
Age 65+ %
0.0%24.2%
Bachelor's+ %
4.5%8.5%
Diversity Index
8/10014/100
Economy
ZIP 20625
Cobb Island CDP, MD
View full profile →- Median Income$161,000
- Unemployment %4.8%
- IRS Net Migration+67
- Work From Home %3.6%
ZIP 20621
MD
View full profile →- Median Income$0
- Unemployment %4.3%
- IRS Net Migration+53
- Work From Home %8.1%
Visual comparison (same scale)
Median Income
$161,000$0
Unemployment %
4.8%4.3%
IRS Net Migration
+67+53
Work From Home %
3.6%8.1%
Housing
ZIP 20625
Cobb Island CDP, MD
View full profile →- Median Home Value$244k
- Owner Occupied %85.2%
- Broadband %100.0%
- Vacant %22.6%
- Median Year Built1938
ZIP 20621
MD
View full profile →- Median Home Value$563k
- Owner Occupied %97.5%
- Broadband %56.3%
- Vacant %31.3%
- Median Year Built1978
Visual comparison (same scale)
Median Home Value
$244k$563k
Owner Occupied %
85.2%97.5%
Broadband %
100.0%56.3%
Vacant %
22.6%31.3%
Median Year Built
19381978
Climate & Location
ZIP 20625
Cobb Island CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)100 ft
- Nearest Airport23.7 miles (38.1 km)
- Distance to Coast0.4 miles (0.7 km)
ZIP 20621
MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)100 ft
- Nearest Airport21.3 miles (34.3 km)
- Distance to Coast1.5 miles (2.4 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
100 ft100 ft
Nearest Airport
23.7 miles (38.1 km)21.3 miles (34.3 km)
Distance to Coast
0.4 miles (0.7 km)1.5 miles (2.4 km)
Infrastructure
ZIP 20625
Cobb Island CDP, MD
View full profile →- Work From Home %3.6%
- Walkability (0–100)25
- Broadband %100.0%
Visual comparison (same scale)
Work From Home %
3.6%8.1%
Walkability (0–100)
2520
Broadband %
100.0%56.3%
Frequently Asked Questions
How do ZIP 20625 and 20621 compare?
ZIP 20625 is wealthier, lower poverty rate. ZIP 20621 is higher home values, lower unemployment, more diverse, more educated, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (20625), orange the second (20621). 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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