21648 vs 20657 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 21648, Orange = ZIP 20657.
Quick verdict: ZIP 21648 is lower unemployment. ZIP 20657 is wealthier, higher home values, lower poverty rate, more diverse, more educated, higher work-from-home share.
Quick Facts
ZIP 21648
Madison CDP, MD
View full profile →- Population104
- Median Income$0
- Median Home Value$171k
- Median Rent—
- Median Age61.7 yrs
- Poverty Rate6.1%
ZIP 20657
Chesapeake Ranch Estates CDP, MD
View full profile →- Population20,519
- Median Income$117,776
- Median Home Value$318k
- Median Rent$1,554
- Median Age35.7 yrs
- Poverty Rate6.0%
Visual comparison (same scale)
Population
10420,519
Median Income
$0$117,776
Median Home Value
$171k$318k
Median Rent
—$1,554
Median Age
61.7 yrs35.7 yrs
Poverty Rate
6.1%6.0%
Demographics
ZIP 21648
Madison CDP, MD
View full profile →- White %84.6%
- Black %2.9%
- Asian %11.5%
- Hispanic %2.9%
- Age 0–17 %7.7%
- Age 18–64 %64.4%
- Age 65+ %27.9%
- Bachelor's+ %15.2%
- Diversity Index27/100
ZIP 20657
Chesapeake Ranch Estates CDP, MD
View full profile →- White %74.6%
- Black %15.5%
- Asian %1.8%
- Hispanic %6.0%
- Age 0–17 %23.4%
- Age 18–64 %64.1%
- Age 65+ %12.6%
- Bachelor's+ %29.4%
- Diversity Index42/100
Visual comparison (same scale)
White %
84.6%74.6%
Black %
2.9%15.5%
Asian %
11.5%1.8%
Hispanic %
2.9%6.0%
Age 0–17 %
7.7%23.4%
Age 18–64 %
64.4%64.1%
Age 65+ %
27.9%12.6%
Bachelor's+ %
15.2%29.4%
Diversity Index
27/10042/100
Economy
ZIP 21648
Madison CDP, MD
View full profile →- Median Income$0
- Unemployment %0.0%
- IRS Net Migration+6
- Work From Home %0.0%
- Mean Commute (min)65 min
ZIP 20657
Chesapeake Ranch Estates CDP, MD
View full profile →- Median Income$117,776
- Unemployment %3.7%
- IRS Net Migration+1,206
- Work From Home %16.4%
- Mean Commute (min)—
Visual comparison (same scale)
Median Income
$0$117,776
Unemployment %
0.0%3.7%
IRS Net Migration
+6+1,206
Work From Home %
0.0%16.4%
Mean Commute (min)
65 min—
Housing
ZIP 21648
Madison CDP, MD
View full profile →- Median Home Value$171k
- Median Rent—
- Owner Occupied %97.5%
- Broadband %100.0%
- Vacant %31.0%
- Median Year Built1947
ZIP 20657
Chesapeake Ranch Estates CDP, MD
View full profile →- Median Home Value$318k
- Median Rent$1,554
- Owner Occupied %87.5%
- Broadband %95.3%
- Vacant %10.2%
- Median Year Built1991
Visual comparison (same scale)
Median Home Value
$171k$318k
Median Rent
—$1,554
Owner Occupied %
97.5%87.5%
Broadband %
100.0%95.3%
Vacant %
31.0%10.2%
Median Year Built
19471991
Climate & Location
ZIP 21648
Madison CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)39 ft
- Nearest Airport16.6 miles (26.8 km)
- Distance to Coast1.5 miles (2.4 km)
ZIP 20657
Chesapeake Ranch Estates CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)12 ft
- Nearest Airport6.7 miles (10.8 km)
- Distance to Coast2.0 miles (3.2 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
39 ft12 ft
Nearest Airport
16.6 miles (26.8 km)6.7 miles (10.8 km)
Distance to Coast
1.5 miles (2.4 km)2.0 miles (3.2 km)
Infrastructure
ZIP 21648
Madison CDP, MD
View full profile →- Mean Commute (min)65 min
- Work From Home %0.0%
- Walkability (0–100)18
- Broadband %100.0%
ZIP 20657
Chesapeake Ranch Estates CDP, MD
View full profile →- Mean Commute (min)—
- Work From Home %16.4%
- Walkability (0–100)29
- Broadband %95.3%
Visual comparison (same scale)
Mean Commute (min)
65 min—
Work From Home %
0.0%16.4%
Walkability (0–100)
1829
Broadband %
100.0%95.3%
Frequently Asked Questions
How do ZIP 21648 and 20657 compare?
ZIP 21648 is lower unemployment. ZIP 20657 is wealthier, higher home values, lower poverty rate, more diverse, more educated, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (21648), orange the second (20657). 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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