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US ZIP Code Profile

ZIP Code 77377
Tomball, Texas

ZIP code 77377 is in Tomball, located in Harris County, Texas, within the Houston-The Woodlands-Sugar Land metro area. Its 2020 Census population was 39,711. The estimated median adjusted gross income per tax return is $73,992, and about 15% of filers report $200,000 or more.

2020 Population
39,711
Census ZCTA
County
Harris
FIPS 48201
Median income (est.)
$73,992
IRS SOI 2022
Land Area
39.117 mi²
+ 0.379 mi² water

01Location & Geography

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

Primary CityTomball, TX
CountyHarris County (FIPS 48201)
StateTexas (FIPS 48)
Metro Area (MSA)Houston-The Woodlands-Sugar Land, TX Metro Area (26420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.061728, -95.6815
Land / Water Area39.117 mi² land · 0.379 mi² water

02Income & Economics

Distribution of the 19,360 individual tax returns filed in 77377 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
22.4%
$25K–$50K
15.3%
$50K–$75K
12.8%
$75K–$100K
9.6%
$100K–$200K
24.5%
$200K+
15.4%
The $200,000+ bracket accounts for 56% of 77377's total adjusted gross income, from 15% of returns — a concentration that drives the gap between the median ($73,992) 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 77377's IRS income metrics, 2020–2022.

Median income (2021→2022)
$73,992
▲ 3.8%
Filers earning $200K+
15.4%
▲ 1.5 pt
Total filers
19,360
▲ 4.5%
GET /zipc/v2/zipcodes/77377/soi?year=… $67K 2020 $71K 2021 $74K 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 77377 ZCTA.

2010
28,708
 
2020
39,711
▲ +38.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number489045
City AliasesTomball

06Frequently Asked Questions

What county is ZIP code 77377 in?

ZIP code 77377 is in Harris County, Texas (county FIPS code 48201).

What city is ZIP code 77377?

The primary USPS city for 77377 is Tomball, TX.

What metro area (MSA) is 77377 in?

77377 is part of the Houston-The Woodlands-Sugar Land, TX Metro Area (MSA code 26420).

What is the population of ZIP code 77377?

The 2020 Census population of 77377 was 39,711 residents.

What is the median income in ZIP code 77377?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77377 is about $73,992, with around 15% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.