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US ZIP Code Profile

ZIP Code 76664
Mart, Texas

ZIP code 76664 is in Mart, located in Mclennan County, Texas, within the Waco metro area. Its 2020 Census population was 3,269. The estimated median adjusted gross income per tax return is $41,118, and about 3% of filers report $200,000 or more.

2020 Population
3,269
Census ZCTA
County
Mclennan
FIPS 48309
Median income (est.)
$41,118
IRS SOI 2022
Land Area
135.045 mi²
+ 1.193 mi² water

01Location & Geography

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

Primary CityMart, TX
CountyMclennan County (FIPS 48309)
StateTexas (FIPS 48)
Metro Area (MSA)Waco, TX Metro Area (47380)
Census Region / DivisionSouth Region · West South Central Division
Coordinates31.560686, -96.80266
Land / Water Area135.045 mi² land · 1.193 mi² water

02Income & Economics

Distribution of the 1,330 individual tax returns filed in 76664 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.6%
$25K–$50K
28.6%
$50K–$75K
15.0%
$75K–$100K
9.8%
$100K–$200K
12.0%
$200K+
3.0%
The $200,000+ bracket accounts for 15% of 76664's total adjusted gross income, from 3% of returns — a concentration that drives the gap between the median ($41,118) 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 76664's IRS income metrics, 2020–2022.

Median income (2021→2022)
$41,118
▲ 12.5%
Filers earning $200K+
3.0%
▲ 0.8 pt
Total filers
1,330
▼ 1.5%
GET /zipc/v2/zipcodes/76664/soi?year=… $36K 2020 $37K 2021 $41K 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 76664 ZCTA.

2000
3,411
 
2010
3,514
▲ +3.0%
2020
3,269
▼ -7.0%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number485675
City AliasesBen Hur, Kirk, Mart, Watt

06Frequently Asked Questions

What county is ZIP code 76664 in?

ZIP code 76664 is in Mclennan County, Texas (county FIPS code 48309).

What city is ZIP code 76664?

The primary USPS city for 76664 is Mart, TX.

What metro area (MSA) is 76664 in?

76664 is part of the Waco, TX Metro Area (MSA code 47380).

What is the population of ZIP code 76664?

The 2020 Census population of 76664 was 3,269 residents.

What is the median income in ZIP code 76664?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 76664 is about $41,118, with around 3% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.