78640 vs 78666 — Compare ZIP Codes
Side-by-side comparison. Blue = ZIP 78640, Orange = ZIP 78666.
Quick verdict: ZIP 78640 is wealthier, higher home values, lower poverty rate, lower unemployment, higher work-from-home share. ZIP 78666 is more affordable rent, more diverse, more educated.
Quick Facts
ZIP 78640
Kyle city, TX
View full profile →- Population71,460
- Median Income$88,533
- Median Home Value$291k
- Median Rent$1,445
- Median Age33.3 yrs
- Poverty Rate9.2%
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
71,46087,775
Median Income
$88,533$55,478
Median Home Value
$291k$272k
Median Rent
$1,445$1,134
Median Age
33.3 yrs27.0 yrs
Poverty Rate
9.2%23.3%
Demographics
ZIP 78640
Kyle city, TX
View full profile →- White %55.4%
- Black %5.2%
- Asian %1.1%
- Hispanic %55.3%
- Age 0–17 %27.6%
- Age 18–64 %65.5%
- Age 65+ %6.9%
- Bachelor's+ %29.2%
- Diversity Index38/100
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 %
55.4%63.7%
Black %
5.2%5.2%
Asian %
1.1%1.8%
Hispanic %
55.3%43.8%
Age 0–17 %
27.6%13.8%
Age 18–64 %
65.5%73.8%
Age 65+ %
6.9%12.5%
Bachelor's+ %
29.2%34.6%
Diversity Index
38/10040/100
Economy
ZIP 78640
Kyle city, TX
View full profile →- Median Income$88,533
- Unemployment %2.8%
- IRS Net Migration+3,371
- Work From Home %10.8%
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
$88,533$55,478
Unemployment %
2.8%5.6%
IRS Net Migration
+3,371+4,140
Work From Home %
10.8%9.4%
Housing
ZIP 78640
Kyle city, TX
View full profile →- Median Home Value$291k
- Median Rent$1,445
- Owner Occupied %71.9%
- Broadband %94.6%
- Vacant %3.5%
- Median Year Built2008
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
$291k$272k
Median Rent
$1,445$1,134
Owner Occupied %
71.9%38.4%
Broadband %
94.6%85.0%
Vacant %
3.5%6.9%
Median Year Built
20081997
Climate & Location
ZIP 78640
Kyle city, TX
View full profile →- Snow Days/Year0 days
- Elevation (ft)665 ft
- Nearest Airport16.9 miles (27.2 km)
- Distance to Coast100.9 miles (162.3 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
16.9 miles (27.2 km)28.5 miles (45.9 km)
Distance to Coast
100.9 miles (162.3 km)98.4 miles (158.3 km)
Infrastructure
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 %
10.8%9.4%
Walkability (0–100)
3536
Broadband %
94.6%85.0%
Frequently Asked Questions
How do ZIP 78640 and 78666 compare?
ZIP 78640 is wealthier, higher home values, lower poverty rate, lower unemployment, higher work-from-home share. ZIP 78666 is more affordable rent, more diverse, more educated.
What do the blue and orange colors mean?
Blue represents the first ZIP (78640), 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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