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US ZIP Code Profile

ZIP Code 77331
Coldspring, Texas

ZIP code 77331 is in Coldspring, located in San Jacinto County, Texas. Its 2020 Census population was 6,953. The estimated median adjusted gross income per tax return is $45,890, and about 6% of filers report $200,000 or more.

2020 Population
6,953
Census ZCTA
County
San Jacinto
FIPS 48407
Median income (est.)
$45,890
IRS SOI 2022
Land Area
153.108 mi²
+ 25.041 mi² water

01Location & Geography

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

Primary CityColdspring, TX
CountySan Jacinto County (FIPS 48407)
StateTexas (FIPS 48)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.633963, -95.16191
Land / Water Area153.108 mi² land · 25.041 mi² water

02Income & Economics

Distribution of the 3,220 individual tax returns filed in 77331 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.1%
$25K–$50K
22.7%
$50K–$75K
13.7%
$75K–$100K
10.2%
$100K–$200K
16.2%
$200K+
6.2%
The $200,000+ bracket accounts for 40% of 77331's total adjusted gross income, from 6% of returns — a concentration that drives the gap between the median ($45,890) 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 77331's IRS income metrics, 2020–2022.

Median income (2021→2022)
$45,890
▲ 7.8%
Filers earning $200K+
6.2%
▲ 0.4 pt
Total filers
3,220
▼ 0.9%
GET /zipc/v2/zipcodes/77331/soi?year=… $42K 2020 $43K 2021 $46K 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 77331 ZCTA.

2000
5,894
 
2010
6,824
▲ +15.8%
2020
6,953
▲ +1.9%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number481870
City AliasesCamilla, Coldspring, Stephen Creek, Willow Springs

06Frequently Asked Questions

What county is ZIP code 77331 in?

ZIP code 77331 is in San Jacinto County, Texas (county FIPS code 48407).

What city is ZIP code 77331?

The primary USPS city for 77331 is Coldspring, TX.

What is the population of ZIP code 77331?

The 2020 Census population of 77331 was 6,953 residents.

What is the median income in ZIP code 77331?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77331 is about $45,890, with around 6% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.