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US ZIP Code Profile

ZIP Code 76661
Marlin, Texas

ZIP code 76661 is in Marlin, located in Falls County, Texas, within the Waco metro area. Its 2020 Census population was 7,982. The estimated median adjusted gross income per tax return is $32,692, and about 1% of filers report $200,000 or more.

2020 Population
7,982
Census ZCTA
County
Falls
FIPS 48145
Median income (est.)
$32,692
IRS SOI 2022
Land Area
160.519 mi²
+ 2.573 mi² water

01Location & Geography

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

Primary CityMarlin, TX
CountyFalls County (FIPS 48145)
StateTexas (FIPS 48)
Metro Area (MSA)Waco, TX Metro Area (47380)
Census Region / DivisionSouth Region · West South Central Division
Coordinates31.318386, -96.846016
Land / Water Area160.519 mi² land · 2.573 mi² water

02Income & Economics

Distribution of the 2,500 individual tax returns filed in 76661 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
40.4%
$25K–$50K
31.2%
$50K–$75K
15.2%
$75K–$100K
6.4%
$100K–$200K
6.0%
$200K+
0.8%
The $200,000+ bracket accounts for 8% of 76661's total adjusted gross income, from 1% of returns — a concentration that drives the gap between the median ($32,692) 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 76661's IRS income metrics, 2020–2022.

Median income (2021→2022)
$32,692
▲ 6.9%
Filers earning $200K+
0.8%
▼ 0.4 pt
Total filers
2,500
▼ 1.6%
GET /zipc/v2/zipcodes/76661/soi?year=… $29K 2020 $31K 2021 $33K 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 76661 ZCTA.

2000
9,518
 
2010
8,708
▼ -8.5%
2020
7,982
▼ -8.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number485660
City AliasesMarlin, Mcclanahan, Rocky Hill

06Frequently Asked Questions

What county is ZIP code 76661 in?

ZIP code 76661 is in Falls County, Texas (county FIPS code 48145).

What city is ZIP code 76661?

The primary USPS city for 76661 is Marlin, TX.

What metro area (MSA) is 76661 in?

76661 is part of the Waco, TX Metro Area (MSA code 47380).

What is the population of ZIP code 76661?

The 2020 Census population of 76661 was 7,982 residents.

What is the median income in ZIP code 76661?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 76661 is about $32,692, with around 1% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.