Get API Key →
US ZIP Code Profile

ZIP Code 77373
Spring, Texas

ZIP code 77373 is in Spring, located in Harris County, Texas, within the Houston-The Woodlands-Sugar Land metro area. Its 2020 Census population was 63,413. The estimated median adjusted gross income per tax return is $42,397, and about 2% of filers report $200,000 or more.

2020 Population
63,413
Census ZCTA
County
Harris
FIPS 48201
Median income (est.)
$42,397
IRS SOI 2022
Land Area
23.751 mi²
+ 0.343 mi² water

01Location & Geography

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

Primary CitySpring, 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
Coordinates30.062168, -95.383965
Land / Water Area23.751 mi² land · 0.343 mi² water

02Income & Economics

Distribution of the 32,550 individual tax returns filed in 77373 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.3%
$25K–$50K
26.8%
$50K–$75K
18.1%
$75K–$100K
10.0%
$100K–$200K
11.9%
$200K+
1.9%
The $200,000+ bracket accounts for 13% of 77373's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($42,397) 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 77373's IRS income metrics, 2020–2022.

Median income (2021→2022)
$42,397
▲ 5.7%
Filers earning $200K+
1.9%
▲ 0.3 pt
Total filers
32,550
▲ 3.8%
GET /zipc/v2/zipcodes/77373/soi?year=… $39K 2020 $40K 2021 $42K 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 77373 ZCTA.

2000
36,388
 
2010
54,609
▲ +50.1%
2020
63,413
▲ +16.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number488565
City AliasesRayford, Spring

06Frequently Asked Questions

What county is ZIP code 77373 in?

ZIP code 77373 is in Harris County, Texas (county FIPS code 48201).

What city is ZIP code 77373?

The primary USPS city for 77373 is Spring, TX.

What metro area (MSA) is 77373 in?

77373 is part of the Houston-The Woodlands-Sugar Land, TX Metro Area (MSA code 26420).

What is the population of ZIP code 77373?

The 2020 Census population of 77373 was 63,413 residents.

What is the median income in ZIP code 77373?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77373 is about $42,397, with around 2% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.