20850 vs 20899 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 20850, Orange = ZIP 20899.
Quick verdict: ZIP 20850 is wealthier, lower poverty rate, lower unemployment, more diverse, more educated, higher work-from-home share. ZIP 20899 is more affordable rent.
Quick Facts
ZIP 20850
Rockville city, MD
View full profile →- Population50,365
- Median Income$122,691
- Median Home Value$687k
- Median Rent$2,138
- Median Age40.8 yrs
- Poverty Rate7.1%
ZIP 20899
Gaithersburg city, MD
View full profile →- Population106
- Median Income$23,917
- Median Home Value—
- Median Rent$835
- Median Age70.4 yrs
- Poverty Rate17.0%
Visual comparison (same scale)
Population
50,365106
Median Income
$122,691$23,917
Median Home Value
$687k—
Median Rent
$2,138$835
Median Age
40.8 yrs70.4 yrs
Poverty Rate
7.1%17.0%
Demographics
ZIP 20850
Rockville city, MD
View full profile →- White %46.7%
- Black %12.1%
- Asian %25.9%
- Hispanic %12.9%
- Age 0–17 %18.8%
- Age 18–64 %61.5%
- Age 65+ %19.6%
- Bachelor's+ %67.1%
- Diversity Index68/100
ZIP 20899
Gaithersburg city, MD
View full profile →- White %30.2%
- Black %69.8%
- Asian %0.0%
- Hispanic %0.0%
- Age 0–17 %0.0%
- Age 18–64 %46.2%
- Age 65+ %53.8%
- Bachelor's+ %33.0%
- Diversity Index42/100
Visual comparison (same scale)
White %
46.7%30.2%
Black %
12.1%69.8%
Asian %
25.9%0.0%
Hispanic %
12.9%0.0%
Age 0–17 %
18.8%0.0%
Age 18–64 %
61.5%46.2%
Age 65+ %
19.6%53.8%
Bachelor's+ %
67.1%33.0%
Diversity Index
68/10042/100
Economy
ZIP 20850
Rockville city, MD
View full profile →- Median Income$122,691
- Unemployment %4.4%
- IRS Net Migration+2,959
- Work From Home %31.9%
- Mean Commute (min)—
ZIP 20899
Gaithersburg city, MD
View full profile →- Median Income$23,917
- Unemployment %56.3%
- IRS Net Migration+6
- Work From Home %0.0%
- Mean Commute (min)14 min
Visual comparison (same scale)
Median Income
$122,691$23,917
Unemployment %
4.4%56.3%
IRS Net Migration
+2,959+6
Work From Home %
31.9%0.0%
Mean Commute (min)
—14 min
Housing
ZIP 20850
Rockville city, MD
View full profile →- Median Home Value$687k
- Median Rent$2,138
- Owner Occupied %51.5%
- Broadband %95.1%
- Vacant %6.0%
- Median Year Built1996
ZIP 20899
Gaithersburg city, MD
View full profile →- Median Home Value—
- Median Rent$835
- Owner Occupied %0.0%
- Broadband %52.8%
- Vacant %0.0%
- Median Year Built1985
Visual comparison (same scale)
Median Home Value
$687k—
Median Rent
$2,138$835
Owner Occupied %
51.5%0.0%
Broadband %
95.1%52.8%
Vacant %
6.0%0.0%
Median Year Built
19961985
Climate & Location
ZIP 20850
Rockville city, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)440 ft
- Nearest Airport17.8 miles (28.7 km)
- Distance to Coast12.7 miles (20.5 km)
ZIP 20899
Gaithersburg city, MD
View full profile →- Snow Days/Year0 days
- Elevation (ft)440 ft
- Nearest Airport18.8 miles (30.3 km)
- Distance to Coast16.8 miles (27.0 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
440 ft440 ft
Nearest Airport
17.8 miles (28.7 km)18.8 miles (30.3 km)
Distance to Coast
12.7 miles (20.5 km)16.8 miles (27.0 km)
Infrastructure
ZIP 20850
Rockville city, MD
View full profile →- Mean Commute (min)—
- Work From Home %31.9%
- Walkability (0–100)69
- Broadband %95.1%
ZIP 20899
Gaithersburg city, MD
View full profile →- Mean Commute (min)14 min
- Work From Home %0.0%
- Walkability (0–100)0
- Broadband %52.8%
Visual comparison (same scale)
Mean Commute (min)
—14 min
Work From Home %
31.9%0.0%
Walkability (0–100)
690
Broadband %
95.1%52.8%
Frequently Asked Questions
How do ZIP 20850 and 20899 compare?
ZIP 20850 is wealthier, lower poverty rate, lower unemployment, more diverse, more educated, higher work-from-home share. ZIP 20899 is more affordable rent.
What do the blue and orange colors mean?
Blue represents the first ZIP (20850), orange the second (20899). 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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