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US ZIP Code Profile

ZIP Code 78643
Llano, Texas

ZIP code 78643 is in Llano, located in Llano County, Texas. Its 2020 Census population was 6,453. The estimated median adjusted gross income per tax return is $47,297, and about 8% of filers report $200,000 or more.

2020 Population
6,453
Census ZCTA
County
Llano
FIPS 48299
Median income (est.)
$47,297
IRS SOI 2022
Land Area
704.025 mi²
+ 5.675 mi² water

01Location & Geography

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

Primary CityLlano, TX
CountyLlano County (FIPS 48299)
StateTexas (FIPS 48)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.688543, -98.68989
Land / Water Area704.025 mi² land · 5.675 mi² water

02Income & Economics

Distribution of the 3,220 individual tax returns filed in 78643 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
29.5%
$25K–$50K
23.0%
$50K–$75K
14.6%
$75K–$100K
9.6%
$100K–$200K
15.5%
$200K+
7.8%
The $200,000+ bracket accounts for 45% of 78643's total adjusted gross income, from 8% of returns — a concentration that drives the gap between the median ($47,297) 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 78643's IRS income metrics, 2020–2022.

Median income (2021→2022)
$47,297
▲ 4.3%
Filers earning $200K+
7.8%
▲ 0.1 pt
Total filers
3,220
▼ 1.8%
GET /zipc/v2/zipcodes/78643/soi?year=… $42K 2020 $45K 2021 $47K 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 78643 ZCTA.

2000
5,903
 
2010
6,139
▲ +4.0%
2020
6,453
▲ +5.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number485230
City AliasesLlano, Sunrise Beach

06Frequently Asked Questions

What county is ZIP code 78643 in?

ZIP code 78643 is in Llano County, Texas (county FIPS code 48299).

What city is ZIP code 78643?

The primary USPS city for 78643 is Llano, TX.

What is the population of ZIP code 78643?

The 2020 Census population of 78643 was 6,453 residents.

What is the median income in ZIP code 78643?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78643 is about $47,297, with around 8% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.