Get API Key →
US ZIP Code Profile

ZIP Code 78933
Cat Spring, Texas

ZIP code 78933 is in Cat Spring, located in Austin County, Texas, within the Houston-The Woodlands-Sugar Land metro area. Its 2020 Census population was 1,531. The estimated median adjusted gross income per tax return is $65,000, and about 13% of filers report $200,000 or more.

2020 Population
1,531
Census ZCTA
County
Austin
FIPS 48015
Median income (est.)
$65,000
IRS SOI 2022
Land Area
108.036 mi²
+ 0.966 mi² water

01Location & Geography

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

Primary CityCat Spring, TX
CountyAustin County (FIPS 48015)
StateTexas (FIPS 48)
Metro Area (MSA)Houston-The Woodlands-Sugar Land, TX Metro Area (26420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.790646, -96.35906
Land / Water Area108.036 mi² land · 0.966 mi² water

02Income & Economics

Distribution of the 760 individual tax returns filed in 78933 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
25.0%
$25K–$50K
17.1%
$50K–$75K
13.2%
$75K–$100K
10.5%
$100K–$200K
21.1%
$200K+
13.2%
The $200,000+ bracket accounts for 56% of 78933's total adjusted gross income, from 13% of returns — a concentration that drives the gap between the median ($65,000) 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 78933's IRS income metrics, 2020–2022.

Median income (2021→2022)
$65,000
▲ 2.1%
Filers earning $200K+
13.2%
▲ 0.0 pt
Total filers
760
▲ 0.0%
GET /zipc/v2/zipcodes/78933/soi?year=… $61K 2020 $64K 2021 $65K 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 78933 ZCTA.

2000
766
 
2010
1,433
▲ +87.1%
2020
1,531
▲ +6.8%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number481525
City AliasesCat Spring

06Frequently Asked Questions

What county is ZIP code 78933 in?

ZIP code 78933 is in Austin County, Texas (county FIPS code 48015).

What city is ZIP code 78933?

The primary USPS city for 78933 is Cat Spring, TX.

What metro area (MSA) is 78933 in?

78933 is part of the Houston-The Woodlands-Sugar Land, TX Metro Area (MSA code 26420).

What is the population of ZIP code 78933?

The 2020 Census population of 78933 was 1,531 residents.

What is the median income in ZIP code 78933?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78933 is about $65,000, with around 13% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.