92078 vs 78666 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 92078, Orange = ZIP 78666.
Quick verdict: ZIP 92078 is wealthier, higher home values, lower poverty rate, lower unemployment, more diverse, more educated, higher work-from-home share. ZIP 78666 is more affordable rent.
Quick Facts
ZIP 92078
San Marcos city, CA
View full profile →- Population53,542
- Median Income$114,905
- Median Home Value$874k
- Median Rent$2,282
- Median Age38.6 yrs
- Poverty Rate8.4%
ZIP 78666
San Marcos city, TX
View full profile →- Population87,775
- Median Income$55,478
- Median Home Value$272k
- Median Rent$1,134
- Median Age27.0 yrs
- Poverty Rate23.3%
Visual comparison (same scale)
Population
53,54287,775
Median Income
$114,905$55,478
Median Home Value
$874k$272k
Median Rent
$2,282$1,134
Median Age
38.6 yrs27.0 yrs
Poverty Rate
8.4%23.3%
Demographics
ZIP 92078
San Marcos city, CA
View full profile →- White %61.9%
- Black %1.3%
- Asian %10.4%
- Hispanic %28.3%
- Age 0–17 %25.1%
- Age 18–64 %58.6%
- Age 65+ %16.3%
- Bachelor's+ %48.3%
- Diversity Index53/100
ZIP 78666
San Marcos city, TX
View full profile →- White %63.7%
- Black %5.2%
- Asian %1.8%
- Hispanic %43.8%
- Age 0–17 %13.8%
- Age 18–64 %73.8%
- Age 65+ %12.5%
- Bachelor's+ %34.6%
- Diversity Index40/100
Visual comparison (same scale)
White %
61.9%63.7%
Black %
1.3%5.2%
Asian %
10.4%1.8%
Hispanic %
28.3%43.8%
Age 0–17 %
25.1%13.8%
Age 18–64 %
58.6%73.8%
Age 65+ %
16.3%12.5%
Bachelor's+ %
48.3%34.6%
Diversity Index
53/10040/100
Economy
ZIP 92078
San Marcos city, CA
View full profile →- Median Income$114,905
- Unemployment %4.4%
- IRS Net Migration+2,635
- Work From Home %23.1%
ZIP 78666
San Marcos city, TX
View full profile →- Median Income$55,478
- Unemployment %5.6%
- IRS Net Migration+4,140
- Work From Home %9.4%
Visual comparison (same scale)
Median Income
$114,905$55,478
Unemployment %
4.4%5.6%
IRS Net Migration
+2,635+4,140
Work From Home %
23.1%9.4%
Housing
ZIP 92078
San Marcos city, CA
View full profile →- Median Home Value$874k
- Median Rent$2,282
- Owner Occupied %71.3%
- Broadband %95.3%
- Vacant %4.8%
- Median Year Built1998
ZIP 78666
San Marcos city, TX
View full profile →- Median Home Value$272k
- Median Rent$1,134
- Owner Occupied %38.4%
- Broadband %85.0%
- Vacant %6.9%
- Median Year Built1997
Visual comparison (same scale)
Median Home Value
$874k$272k
Median Rent
$2,282$1,134
Owner Occupied %
71.3%38.4%
Broadband %
95.3%85.0%
Vacant %
4.8%6.9%
Median Year Built
19981997
Climate & Location
ZIP 92078
San Marcos city, CA
View full profile →- Snow Days/Year0 days
- Elevation (ft)600 ft
- Nearest Airport5.8 miles (9.3 km)
- Distance to Coast8.4 miles (13.6 km)
ZIP 78666
San Marcos city, TX
View full profile →- Snow Days/Year0 days
- Elevation (ft)665 ft
- Nearest Airport28.5 miles (45.9 km)
- Distance to Coast98.4 miles (158.3 km)
Visual comparison (same scale)
Snow Days/Year
0 days0 days
Elevation (ft)
600 ft665 ft
Nearest Airport
5.8 miles (9.3 km)28.5 miles (45.9 km)
Distance to Coast
8.4 miles (13.6 km)98.4 miles (158.3 km)
Infrastructure
ZIP 92078
San Marcos city, CA
View full profile →- Work From Home %23.1%
- Walkability (0–100)65
- Broadband %95.3%
ZIP 78666
San Marcos city, TX
View full profile →- Work From Home %9.4%
- Walkability (0–100)36
- Broadband %85.0%
Visual comparison (same scale)
Work From Home %
23.1%9.4%
Walkability (0–100)
6536
Broadband %
95.3%85.0%
Frequently Asked Questions
How do ZIP 92078 and 78666 compare?
ZIP 92078 is wealthier, higher home values, lower poverty rate, lower unemployment, more diverse, more educated, higher work-from-home share. ZIP 78666 is more affordable rent.
What do the blue and orange colors mean?
Blue represents the first ZIP (92078), orange the second (78666). 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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