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US ZIP Code Profile

ZIP Code 78657
Horseshoe Bay, Texas

ZIP code 78657 is in Horseshoe Bay, located in Llano County, Texas. Its 2020 Census population was 6,531. The estimated median adjusted gross income per tax return is $76,515, and about 21% of filers report $200,000 or more.

2020 Population
6,531
Census ZCTA
County
Llano
FIPS 48299
Median income (est.)
$76,515
IRS SOI 2022
Land Area
39.456 mi²
+ 3.203 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityHorseshoe Bay, TX
CountyLlano County (FIPS 48299)
StateTexas (FIPS 48)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.531427, -98.37805
Land / Water Area39.456 mi² land · 3.203 mi² water

02Income & Economics

Distribution of the 3,780 individual tax returns filed in 78657 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
19.6%
$25K–$50K
17.7%
$50K–$75K
12.2%
$75K–$100K
8.7%
$100K–$200K
20.6%
$200K+
21.2%
The $200,000+ bracket accounts for 78% of 78657's total adjusted gross income, from 21% of returns — a concentration that drives the gap between the median ($76,515) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 78657's IRS income metrics, 2020–2022.

Median income (2021→2022)
$76,515
▲ 2.0%
Filers earning $200K+
21.2%
▼ 0.3 pt
Total filers
3,780
▲ 2.7%
GET /zipc/v2/zipcodes/78657/soi?year=… $62K 2020 $75K 2021 $77K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 78657 ZCTA.

2000
1,113
 
2010
5,509
▲ +395.0%
2020
6,531
▲ +18.6%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypeBranch
Carrier Route SortD
USPS Finance Number485625
City AliasesHorseshoe Bay, Marble Falls, Cottonwood Shores, Cottonwd Shrs

06Frequently Asked Questions

What county is ZIP code 78657 in?

ZIP code 78657 is in Llano County, Texas (county FIPS code 48299).

What city is ZIP code 78657?

The primary USPS city for 78657 is Horseshoe Bay, TX.

What is the population of ZIP code 78657?

The 2020 Census population of 78657 was 6,531 residents.

What is the median income in ZIP code 78657?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78657 is about $76,515, with around 21% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.