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US ZIP Code Profile

ZIP Code 78503
Mcallen, Texas

ZIP code 78503 is in Mcallen, located in Hidalgo County, Texas, within the McAllen-Edinburg-Mission metro area. Its 2020 Census population was 23,604. The estimated median adjusted gross income per tax return is $29,941, and about 4% of filers report $200,000 or more.

2020 Population
23,604
Census ZCTA
County
Hidalgo
FIPS 48215
Median income (est.)
$29,941
IRS SOI 2022
Land Area
16.971 mi²
+ 0.166 mi² water

01Location & Geography

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

Primary CityMcallen, TX
CountyHidalgo County (FIPS 48215)
StateTexas (FIPS 48)
Metro Area (MSA)McAllen-Edinburg-Mission, TX Metro Area (32580)
Census Region / DivisionSouth Region · West South Central Division
Coordinates26.162333, -98.2487
Land / Water Area16.971 mi² land · 0.166 mi² water

02Income & Economics

Distribution of the 9,440 individual tax returns filed in 78503 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
44.7%
$25K–$50K
26.8%
$50K–$75K
11.4%
$75K–$100K
6.5%
$100K–$200K
6.8%
$200K+
3.8%
The $200,000+ bracket accounts for 40% of 78503's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($29,941) 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 78503's IRS income metrics, 2020–2022.

Median income (2021→2022)
$29,941
▲ 12.5%
Filers earning $200K+
3.8%
▲ 0.2 pt
Total filers
9,440
▲ 0.7%
GET /zipc/v2/zipcodes/78503/soi?year=… $25K 2020 $27K 2021 $30K 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 78503 ZCTA.

2000
17,438
 
2010
21,706
▲ +24.5%
2020
23,604
▲ +8.7%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number485455
City AliasesMc Allen, Mcallen

06Frequently Asked Questions

What county is ZIP code 78503 in?

ZIP code 78503 is in Hidalgo County, Texas (county FIPS code 48215).

What city is ZIP code 78503?

The primary USPS city for 78503 is Mcallen, TX.

What metro area (MSA) is 78503 in?

78503 is part of the McAllen-Edinburg-Mission, TX Metro Area (MSA code 32580).

What is the population of ZIP code 78503?

The 2020 Census population of 78503 was 23,604 residents.

What is the median income in ZIP code 78503?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78503 is about $29,941, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.