94021 vs 94404 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 94021, Orange = ZIP 94404.
Quick verdict: ZIP 94021 is wealthier, lower poverty rate, lower unemployment. ZIP 94404 is higher home values, more diverse, more educated, higher work-from-home share.
Quick Facts
ZIP 94021
Loma Mar CDP, CA
View full profile →- Population332
- Median Income$209,712
- Median Home Value$1021k
- Median Rent—
- Median Age51.1 yrs
- Poverty Rate0.0%
ZIP 94404
Foster City city, CA
View full profile →- Population35,950
- Median Income$182,417
- Median Home Value$1683k
- Median Rent$3,501
- Median Age40.1 yrs
- Poverty Rate4.7%
Visual comparison (same scale)
Population
33235,950
Median Income
$209,712$182,417
Median Home Value
$1021k$1683k
Median Rent
—$3,501
Median Age
51.1 yrs40.1 yrs
Poverty Rate
0.0%4.7%
Demographics
ZIP 94021
Loma Mar CDP, CA
View full profile →- White %91.9%
- Black %0.0%
- Asian %8.1%
- Hispanic %0.0%
- Age 0–17 %24.4%
- Age 18–64 %42.5%
- Age 65+ %33.1%
- Bachelor's+ %63.4%
- Diversity Index15/100
ZIP 94404
Foster City city, CA
View full profile →- White %34.7%
- Black %1.7%
- Asian %52.1%
- Hispanic %6.8%
- Age 0–17 %21.5%
- Age 18–64 %60.5%
- Age 65+ %18.1%
- Bachelor's+ %74.5%
- Diversity Index60/100
Visual comparison (same scale)
White %
91.9%34.7%
Black %
0.0%1.7%
Asian %
8.1%52.1%
Hispanic %
0.0%6.8%
Age 0–17 %
24.4%21.5%
Age 18–64 %
42.5%60.5%
Age 65+ %
33.1%18.1%
Bachelor's+ %
63.4%74.5%
Diversity Index
15/10060/100
Economy
ZIP 94021
Loma Mar CDP, CA
View full profile →- Median Income$209,712
- Unemployment %0.0%
- IRS Net Migration+16
- Work From Home %6.3%
ZIP 94404
Foster City city, CA
View full profile →- Median Income$182,417
- Unemployment %4.5%
- IRS Net Migration+1,769
- Work From Home %29.8%
Visual comparison (same scale)
Median Income
$209,712$182,417
Unemployment %
0.0%4.5%
IRS Net Migration
+16+1,769
Work From Home %
6.3%29.8%
Housing
ZIP 94021
Loma Mar CDP, CA
View full profile →- Median Home Value$1021k
- Median Rent—
- Owner Occupied %74.3%
- Broadband %100.0%
- Vacant %7.5%
- Median Year Built1938
ZIP 94404
Foster City city, CA
View full profile →- Median Home Value$1683k
- Median Rent$3,501
- Owner Occupied %51.1%
- Broadband %97.7%
- Vacant %3.8%
- Median Year Built1977
Visual comparison (same scale)
Median Home Value
$1021k$1683k
Median Rent
—$3,501
Owner Occupied %
74.3%51.1%
Broadband %
100.0%97.7%
Vacant %
7.5%3.8%
Median Year Built
19381977
Climate & Location
ZIP 94021
Loma Mar CDP, CA
View full profile →- Snow Days/Year0 days
- Elevation (ft)275 ft
- Nearest Airport16.0 miles (25.7 km)
- Distance to Coast7.2 miles (11.6 km)
ZIP 94404
Foster City city, CA
View full profile →- Snow Days/Year0 days
- Elevation (ft)31 ft
- Nearest Airport3.1 miles (5.0 km)
- Distance to Coast0.8 miles (1.4 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
275 ft31 ft
Nearest Airport
16.0 miles (25.7 km)3.1 miles (5.0 km)
Distance to Coast
7.2 miles (11.6 km)0.8 miles (1.4 km)
Infrastructure
ZIP 94021
Loma Mar CDP, CA
View full profile →- Work From Home %6.3%
- Walkability (0–100)26
- Broadband %100.0%
ZIP 94404
Foster City city, CA
View full profile →- Work From Home %29.8%
- Walkability (0–100)55
- Broadband %97.7%
Visual comparison (same scale)
Work From Home %
6.3%29.8%
Walkability (0–100)
2655
Broadband %
100.0%97.7%
Frequently Asked Questions
How do ZIP 94021 and 94404 compare?
ZIP 94021 is wealthier, lower poverty rate, lower unemployment. ZIP 94404 is higher home values, more diverse, more educated, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (94021), orange the second (94404). 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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