78656 vs 78666 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 78656, Orange = ZIP 78666.
Quick verdict: ZIP 78656 is wealthier, lower poverty rate, lower unemployment. ZIP 78666 is higher home values, more affordable rent, more diverse, more educated, higher work-from-home share.
Quick Facts
ZIP 78656
San Marcos city, TX
View full profile →- Population2,953
- Median Income$78,058
- Median Home Value$195k
- Median Rent$1,154
- Median Age32.6 yrs
- Poverty Rate7.3%
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
2,95387,775
Median Income
$78,058$55,478
Median Home Value
$195k$272k
Median Rent
$1,154$1,134
Median Age
32.6 yrs27.0 yrs
Poverty Rate
7.3%23.3%
Demographics
ZIP 78656
San Marcos city, TX
View full profile →- White %67.2%
- Black %5.6%
- Asian %0.0%
- Hispanic %75.8%
- Age 0–17 %23.5%
- Age 18–64 %65.7%
- Age 65+ %10.8%
- Bachelor's+ %11.1%
- Diversity Index-3/100
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 %
67.2%63.7%
Black %
5.6%5.2%
Asian %
0.0%1.8%
Hispanic %
75.8%43.8%
Age 0–17 %
23.5%13.8%
Age 18–64 %
65.7%73.8%
Age 65+ %
10.8%12.5%
Bachelor's+ %
11.1%34.6%
Diversity Index
-3/10040/100
Economy
ZIP 78656
San Marcos city, TX
View full profile →- Median Income$78,058
- Unemployment %3.3%
- IRS Net Migration+139
- Work From Home %2.9%
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
$78,058$55,478
Unemployment %
3.3%5.6%
IRS Net Migration
+139+4,140
Work From Home %
2.9%9.4%
Housing
ZIP 78656
San Marcos city, TX
View full profile →- Median Home Value$195k
- Median Rent$1,154
- Owner Occupied %63.5%
- Broadband %80.6%
- Vacant %1.1%
- Median Year Built1997
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
$195k$272k
Median Rent
$1,154$1,134
Owner Occupied %
63.5%38.4%
Broadband %
80.6%85.0%
Vacant %
1.1%6.9%
Median Year Built
19971997
Climate & Location
ZIP 78656
San Marcos city, TX
View full profile →- Snow Days/Year0 days
- Elevation (ft)665 ft
- Nearest Airport22.0 miles (35.5 km)
- Distance to Coast94.6 miles (152.2 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)
665 ft665 ft
Nearest Airport
22.0 miles (35.5 km)28.5 miles (45.9 km)
Distance to Coast
94.6 miles (152.2 km)98.4 miles (158.3 km)
Infrastructure
ZIP 78656
San Marcos city, TX
View full profile →- Work From Home %2.9%
- Walkability (0–100)22
- Broadband %80.6%
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 %
2.9%9.4%
Walkability (0–100)
2236
Broadband %
80.6%85.0%
Frequently Asked Questions
How do ZIP 78656 and 78666 compare?
ZIP 78656 is wealthier, lower poverty rate, lower unemployment. ZIP 78666 is higher home values, more affordable rent, more diverse, more educated, higher work-from-home share.
What do the blue and orange colors mean?
Blue represents the first ZIP (78656), 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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