94509 vs 94521 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 94509, Orange = ZIP 94521.
Quick verdict: ZIP 94509 is more affordable rent, more diverse. ZIP 94521 is wealthier, higher home values, lower poverty rate, lower unemployment, more educated, higher work-from-home share.
Quick Facts
ZIP 94509
Antioch city, CA
View full profile →- Population71,013
- Median Income$81,512
- Median Home Value$565k
- Median Rent$1,779
- Median Age37.6 yrs
- Poverty Rate13.7%
ZIP 94521
Concord city, CA
View full profile →- Population41,118
- Median Income$127,312
- Median Home Value$823k
- Median Rent$2,202
- Median Age43.0 yrs
- Poverty Rate5.6%
Visual comparison (same scale)
Population
71,01341,118
Median Income
$81,512$127,312
Median Home Value
$565k$823k
Median Rent
$1,779$2,202
Median Age
37.6 yrs43.0 yrs
Poverty Rate
13.7%5.6%
Demographics
ZIP 94509
Antioch city, CA
View full profile →- White %30.7%
- Black %16.7%
- Asian %9.1%
- Hispanic %42.5%
- Age 0–17 %24.1%
- Age 18–64 %61.5%
- Age 65+ %14.4%
- Bachelor's+ %18.9%
- Diversity Index69/100
ZIP 94521
Concord city, CA
View full profile →- White %58.0%
- Black %5.1%
- Asian %15.8%
- Hispanic %17.0%
- Age 0–17 %19.0%
- Age 18–64 %61.4%
- Age 65+ %19.6%
- Bachelor's+ %44.0%
- Diversity Index60/100
Visual comparison (same scale)
White %
30.7%58.0%
Black %
16.7%5.1%
Asian %
9.1%15.8%
Hispanic %
42.5%17.0%
Age 0–17 %
24.1%19.0%
Age 18–64 %
61.5%61.4%
Age 65+ %
14.4%19.6%
Bachelor's+ %
18.9%44.0%
Diversity Index
69/10060/100
Economy
ZIP 94509
Antioch city, CA
View full profile →- Median Income$81,512
- Unemployment %8.1%
- IRS Net Migration+3,495
- Work From Home %8.1%
ZIP 94521
Concord city, CA
View full profile →- Median Income$127,312
- Unemployment %5.6%
- IRS Net Migration+2,023
- Work From Home %18.2%
Visual comparison (same scale)
Median Income
$81,512$127,312
Unemployment %
8.1%5.6%
IRS Net Migration
+3,495+2,023
Work From Home %
8.1%18.2%
Housing
ZIP 94509
Antioch city, CA
View full profile →- Median Home Value$565k
- Median Rent$1,779
- Owner Occupied %58.3%
- Broadband %94.6%
- Vacant %2.6%
- Median Year Built1975
ZIP 94521
Concord city, CA
View full profile →- Median Home Value$823k
- Median Rent$2,202
- Owner Occupied %73.3%
- Broadband %97.2%
- Vacant %3.0%
- Median Year Built1974
Visual comparison (same scale)
Median Home Value
$565k$823k
Median Rent
$1,779$2,202
Owner Occupied %
58.3%73.3%
Broadband %
94.6%97.2%
Vacant %
2.6%3.0%
Median Year Built
19751974
Climate & Location
ZIP 94509
Antioch city, CA
View full profile →- Snow Days/Year0 days
- Elevation (ft)60 ft
- Nearest Airport13.3 miles (21.5 km)
- Distance to Coast1.5 miles (2.4 km)
ZIP 94521
Concord city, CA
View full profile →- Snow Days/Year0 days
- Elevation (ft)2,170 ft
- Nearest Airport6.0 miles (9.6 km)
- Distance to Coast5.9 miles (9.5 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
60 ft2,170 ft
Nearest Airport
13.3 miles (21.5 km)6.0 miles (9.6 km)
Distance to Coast
1.5 miles (2.4 km)5.9 miles (9.5 km)
Infrastructure
ZIP 94509
Antioch city, CA
View full profile →- Work From Home %8.1%
- Walkability (0–100)45
- Broadband %94.6%
ZIP 94521
Concord city, CA
View full profile →- Work From Home %18.2%
- Walkability (0–100)61
- Broadband %97.2%
Visual comparison (same scale)
Work From Home %
8.1%18.2%
Walkability (0–100)
4561
Broadband %
94.6%97.2%
Frequently Asked Questions
How do ZIP 94509 and 94521 compare?
ZIP 94509 is more affordable rent, more diverse. ZIP 94521 is wealthier, higher home values, lower poverty rate, lower unemployment, more educated, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (94509), orange the second (94521). 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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