99121 vs 21557 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 99121, Orange = ZIP 21557.
Quick verdict: ZIP 99121 is wealthier, higher home values, lower poverty rate, more educated, higher work-from-home share. ZIP 21557 is more diverse.
Quick Facts
ZIP 99121
Danville CDP, WA
View full profile →- Population325
- Median Income$80,833
- Median Home Value$421k
- Median Age52.4 yrs
- Poverty Rate10.2%
ZIP 21557
Danville CDP, MD
View full profile →- Population1,323
- Median Income$33,646
- Median Home Value$100k
- Median Age49.3 yrs
- Poverty Rate15.3%
Visual comparison (same scale)
Population
3251,323
Median Income
$80,833$33,646
Median Home Value
$421k$100k
Median Age
52.4 yrs49.3 yrs
Poverty Rate
10.2%15.3%
Demographics
ZIP 99121
Danville CDP, WA
View full profile →- White %96.3%
- Black %0.0%
- Asian %0.0%
- Hispanic %0.0%
- Age 0–17 %9.8%
- Age 18–64 %66.8%
- Age 65+ %23.4%
- Bachelor's+ %47.5%
- Diversity Index7/100
ZIP 21557
Danville CDP, MD
View full profile →- White %92.7%
- Black %0.0%
- Asian %7.3%
- Hispanic %0.0%
- Age 0–17 %15.3%
- Age 18–64 %65.6%
- Age 65+ %19.1%
- Bachelor's+ %24.2%
- Diversity Index13/100
Visual comparison (same scale)
White %
96.3%92.7%
Black %
0.0%0.0%
Asian %
0.0%7.3%
Hispanic %
0.0%0.0%
Age 0–17 %
9.8%15.3%
Age 18–64 %
66.8%65.6%
Age 65+ %
23.4%19.1%
Bachelor's+ %
47.5%24.2%
Diversity Index
7/10013/100
Economy
ZIP 99121
Danville CDP, WA
View full profile →- Median Income$80,833
- Unemployment %0.0%
- IRS Net Migration+17
- Work From Home %10.2%
- Mean Commute (min)115 min
ZIP 21557
Danville CDP, MD
View full profile →- Median Income$33,646
- Unemployment %0.0%
- IRS Net Migration+78
- Work From Home %10.0%
- Mean Commute (min)—
Visual comparison (same scale)
Median Income
$80,833$33,646
Unemployment %
0.0%0.0%
IRS Net Migration
+17+78
Work From Home %
10.2%10.0%
Mean Commute (min)
115 min—
Housing
ZIP 99121
Danville CDP, WA
View full profile →- Median Home Value$421k
- Owner Occupied %81.3%
- Broadband %76.8%
- Vacant %20.0%
- Median Year Built1994
ZIP 21557
Danville CDP, MD
View full profile →- Median Home Value$100k
- Owner Occupied %77.0%
- Broadband %73.6%
- Vacant %14.2%
- Median Year Built1961
Visual comparison (same scale)
Median Home Value
$421k$100k
Owner Occupied %
81.3%77.0%
Broadband %
76.8%73.6%
Vacant %
20.0%14.2%
Median Year Built
19941961
Climate & Location
ZIP 99121
Danville CDP, WA
View full profile →- Snow Days/Year0 days
- Elevation (ft)2,555 ft
- Nearest Airport5.8 miles (9.3 km)
- Distance to Coast176.2 miles (283.5 km)
ZIP 21557
Danville CDP, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)965 ft
- Nearest Airport51.0 miles (82.1 km)
- Distance to Coast106.2 miles (170.9 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
2,555 ft965 ft
Nearest Airport
5.8 miles (9.3 km)51.0 miles (82.1 km)
Distance to Coast
176.2 miles (283.5 km)106.2 miles (170.9 km)
Infrastructure
ZIP 99121
Danville CDP, WA
View full profile →- Mean Commute (min)115 min
- Work From Home %10.2%
- Walkability (0–100)20
- Broadband %76.8%
ZIP 21557
Danville CDP, MD
View full profile →- Mean Commute (min)—
- Work From Home %10.0%
- Walkability (0–100)36
- Broadband %73.6%
Visual comparison (same scale)
Mean Commute (min)
115 min—
Work From Home %
10.2%10.0%
Walkability (0–100)
2036
Broadband %
76.8%73.6%
Frequently Asked Questions
How do ZIP 99121 and 21557 compare?
ZIP 99121 is wealthier, higher home values, lower poverty rate, more educated, higher work-from-home share. ZIP 21557 is more diverse.
What do the blue and orange colors mean?
Blue represents the first ZIP (99121), orange the second (21557). 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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