21677 vs 21664 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 21677, Orange = ZIP 21664.
Quick verdict: ZIP 21677 is wealthier, higher home values, more educated, higher work-from-home share. ZIP 21664 is lower poverty rate, lower unemployment, more diverse.
Quick Facts
ZIP 21677
Madison CDP, MD
View full profile →- Population534
- Median Income$112,578
- Median Home Value$439k
- Median Rent—
- Median Age55.0 yrs
- Poverty Rate33.4%
ZIP 21664
Secretary town, MD
View full profile →- Population598
- Median Income$68,333
- Median Home Value$172k
- Median Rent$917
- Median Age37.1 yrs
- Poverty Rate9.7%
Visual comparison (same scale)
Population
534598
Median Income
$112,578$68,333
Median Home Value
$439k$172k
Median Rent
—$917
Median Age
55.0 yrs37.1 yrs
Poverty Rate
33.4%9.7%
Demographics
ZIP 21677
Madison CDP, MD
View full profile →- White %98.7%
- Black %0.4%
- Asian %0.0%
- Hispanic %0.8%
- Age 0–17 %19.3%
- Age 18–64 %48.3%
- Age 65+ %32.4%
- Bachelor's+ %23.2%
- Diversity Index3/100
ZIP 21664
Secretary town, MD
View full profile →- White %79.3%
- Black %0.2%
- Asian %0.0%
- Hispanic %19.2%
- Age 0–17 %31.6%
- Age 18–64 %53.2%
- Age 65+ %15.2%
- Bachelor's+ %17.0%
- Diversity Index33/100
Visual comparison (same scale)
White %
98.7%79.3%
Black %
0.4%0.2%
Asian %
0.0%0.0%
Hispanic %
0.8%19.2%
Age 0–17 %
19.3%31.6%
Age 18–64 %
48.3%53.2%
Age 65+ %
32.4%15.2%
Bachelor's+ %
23.2%17.0%
Diversity Index
3/10033/100
Economy
ZIP 21677
Madison CDP, MD
View full profile →- Median Income$112,578
- Unemployment %10.3%
- IRS Net Migration+31
- Work From Home %3.8%
ZIP 21664
Secretary town, MD
View full profile →- Median Income$68,333
- Unemployment %6.2%
- IRS Net Migration+35
- Work From Home %3.5%
Visual comparison (same scale)
Median Income
$112,578$68,333
Unemployment %
10.3%6.2%
IRS Net Migration
+31+35
Work From Home %
3.8%3.5%
Housing
ZIP 21677
Madison CDP, MD
View full profile →- Median Home Value$439k
- Median Rent—
- Owner Occupied %86.7%
- Broadband %90.5%
- Vacant %24.4%
- Median Year Built1980
ZIP 21664
Secretary town, MD
View full profile →- Median Home Value$172k
- Median Rent$917
- Owner Occupied %67.4%
- Broadband %88.6%
- Vacant %12.3%
- Median Year Built1971
Visual comparison (same scale)
Median Home Value
$439k$172k
Median Rent
—$917
Owner Occupied %
86.7%67.4%
Broadband %
90.5%88.6%
Vacant %
24.4%12.3%
Median Year Built
19801971
Climate & Location
ZIP 21677
Madison CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)10 ft
- Nearest Airport18.2 miles (29.3 km)
- Distance to Coast2.1 miles (3.4 km)
ZIP 21664
Secretary town, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)10 ft
- Nearest Airport29.9 miles (48.1 km)
- Distance to Coast1.4 miles (2.3 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
10 ft10 ft
Nearest Airport
18.2 miles (29.3 km)29.9 miles (48.1 km)
Distance to Coast
2.1 miles (3.4 km)1.4 miles (2.3 km)
Infrastructure
ZIP 21677
Madison CDP, MD
View full profile →- Work From Home %3.8%
- Walkability (0–100)18
- Broadband %90.5%
ZIP 21664
Secretary town, MD
View full profile →- Work From Home %3.5%
- Walkability (0–100)23
- Broadband %88.6%
Visual comparison (same scale)
Work From Home %
3.8%3.5%
Walkability (0–100)
1823
Broadband %
90.5%88.6%
Frequently Asked Questions
How do ZIP 21677 and 21664 compare?
ZIP 21677 is wealthier, higher home values, more educated, higher work-from-home share. ZIP 21664 is lower poverty rate, lower unemployment, more diverse.
What do the blue and orange colors mean?
Blue represents the first ZIP (21677), orange the second (21664). 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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