21012 vs 21409 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 21012, Orange = ZIP 21409.
Quick verdict: ZIP 21012 is higher home values, more educated. ZIP 21409 is wealthier, more affordable rent, lower poverty rate, lower unemployment, more diverse, higher work-from-home share.
Quick Facts
ZIP 21012
Arnold CDP, MD
View full profile →- Population22,306
- Median Income$137,544
- Median Home Value$552k
- Median Rent$1,846
- Median Age38.6 yrs
- Poverty Rate3.1%
ZIP 21409
Cape St. Claire CDP, MD
View full profile →- Population20,175
- Median Income$146,667
- Median Home Value$500k
- Median Rent$1,787
- Median Age42.8 yrs
- Poverty Rate2.5%
Visual comparison (same scale)
Population
22,30620,175
Median Income
$137,544$146,667
Median Home Value
$552k$500k
Median Rent
$1,846$1,787
Median Age
38.6 yrs42.8 yrs
Poverty Rate
3.1%2.5%
Demographics
ZIP 21012
Arnold CDP, MD
View full profile →- White %82.4%
- Black %4.1%
- Asian %3.6%
- Hispanic %10.5%
- Age 0–17 %25.6%
- Age 18–64 %59.1%
- Age 65+ %15.3%
- Bachelor's+ %59.8%
- Diversity Index31/100
ZIP 21409
Cape St. Claire CDP, MD
View full profile →- White %82.3%
- Black %4.5%
- Asian %2.8%
- Hispanic %7.2%
- Age 0–17 %24.2%
- Age 18–64 %57.2%
- Age 65+ %18.6%
- Bachelor's+ %57.4%
- Diversity Index31/100
Visual comparison (same scale)
White %
82.4%82.3%
Black %
4.1%4.5%
Asian %
3.6%2.8%
Hispanic %
10.5%7.2%
Age 0–17 %
25.6%24.2%
Age 18–64 %
59.1%57.2%
Age 65+ %
15.3%18.6%
Bachelor's+ %
59.8%57.4%
Diversity Index
31/10031/100
Economy
ZIP 21012
Arnold CDP, MD
View full profile →- Median Income$137,544
- Unemployment %3.3%
- IRS Net Migration+1,310
- Work From Home %21.0%
ZIP 21409
Cape St. Claire CDP, MD
View full profile →- Median Income$146,667
- Unemployment %3.2%
- IRS Net Migration+1,185
- Work From Home %22.3%
Visual comparison (same scale)
Median Income
$137,544$146,667
Unemployment %
3.3%3.2%
IRS Net Migration
+1,310+1,185
Work From Home %
21.0%22.3%
Housing
ZIP 21012
Arnold CDP, MD
View full profile →- Median Home Value$552k
- Median Rent$1,846
- Owner Occupied %84.9%
- Broadband %97.7%
- Vacant %4.7%
- Median Year Built1980
ZIP 21409
Cape St. Claire CDP, MD
View full profile →- Median Home Value$500k
- Median Rent$1,787
- Owner Occupied %90.4%
- Broadband %97.5%
- Vacant %3.7%
- Median Year Built1981
Visual comparison (same scale)
Median Home Value
$552k$500k
Median Rent
$1,846$1,787
Owner Occupied %
84.9%90.4%
Broadband %
97.7%97.5%
Vacant %
4.7%3.7%
Median Year Built
19801981
Climate & Location
ZIP 21012
Arnold CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)25 ft
- Nearest Airport12.8 miles (20.7 km)
- Distance to Coast1.4 miles (2.2 km)
ZIP 21409
Cape St. Claire CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)8 ft
- Nearest Airport16.3 miles (26.2 km)
- Distance to Coast0.7 miles (1.1 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
25 ft8 ft
Nearest Airport
12.8 miles (20.7 km)16.3 miles (26.2 km)
Distance to Coast
1.4 miles (2.2 km)0.7 miles (1.1 km)
Infrastructure
ZIP 21012
Arnold CDP, MD
View full profile →- Work From Home %21.0%
- Walkability (0–100)43
- Broadband %97.7%
ZIP 21409
Cape St. Claire CDP, MD
View full profile →- Work From Home %22.3%
- Walkability (0–100)39
- Broadband %97.5%
Visual comparison (same scale)
Work From Home %
21.0%22.3%
Walkability (0–100)
4339
Broadband %
97.7%97.5%
Frequently Asked Questions
How do ZIP 21012 and 21409 compare?
ZIP 21012 is higher home values, more educated. ZIP 21409 is wealthier, more affordable rent, lower poverty rate, lower unemployment, more diverse, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (21012), orange the second (21409). 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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