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US ZIP Code Profile

ZIP Code 76578
Thrall, Texas

ZIP code 76578 is in Thrall, located in Williamson County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 1,817. The estimated median adjusted gross income per tax return is $48,295, and about 7% of filers report $200,000 or more.

2020 Population
1,817
Census ZCTA
County
Williamson
FIPS 48491
Median income (est.)
$48,295
IRS SOI 2022
Land Area
75.058 mi²
+ 0.969 mi² water

01Location & Geography

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

Primary CityThrall, TX
CountyWilliamson County (FIPS 48491)
StateTexas (FIPS 48)
Metro Area (MSA)Austin-Round Rock, TX Metro Area (12420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.53541, -97.23717
Land / Water Area75.058 mi² land · 0.969 mi² water

02Income & Economics

Distribution of the 910 individual tax returns filed in 76578 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
27.5%
$25K–$50K
24.2%
$50K–$75K
13.2%
$75K–$100K
11.0%
$100K–$200K
17.6%
$200K+
6.6%
The $200,000+ bracket accounts for 34% of 76578's total adjusted gross income, from 7% of returns — a concentration that drives the gap between the median ($48,295) 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 76578's IRS income metrics, 2020–2022.

Median income (2021→2022)
$48,295
▲ 2.4%
Filers earning $200K+
6.6%
▲ 0.8 pt
Total filers
910
▲ 4.6%
GET /zipc/v2/zipcodes/76578/soi?year=… $45K 2020 $47K 2021 $48K 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 76578 ZCTA.

2000
1,473
 
2010
1,766
▲ +19.9%
2020
1,817
▲ +2.9%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number488990
City AliasesThrall

06Frequently Asked Questions

What county is ZIP code 76578 in?

ZIP code 76578 is in Williamson County, Texas (county FIPS code 48491).

What city is ZIP code 76578?

The primary USPS city for 76578 is Thrall, TX.

What metro area (MSA) is 76578 in?

76578 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 76578?

The 2020 Census population of 76578 was 1,817 residents.

What is the median income in ZIP code 76578?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 76578 is about $48,295, with around 7% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.