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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/TX/PORT-MANSFIELD

Port Mansfield ZIP code, Texas

The ZIP code for Port Mansfield, TX is 78598, and its area code is 956.

USPS city name
1 ZIP code
Population
245
Area code
956
State
Texas

Port Mansfield in numbers

About 245 people live in Port Mansfield, in 126 households. The median age is 60.8; 52.8% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 16 minutes.

Population245Port Mansfield245
Households126Port Mansfield126
Median age60.8Port Mansfield60.8Texas35.6US 38.9
Bachelor's degree or higher52.8%Port Mansfield52.8%Texas33.8%US 35.7%
Mean commute15.7 minPort Mansfield15.7 minTexas26.7 minUS 26.4 min
Population density50 / sq miPort Mansfield50 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Port Mansfield CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Port Mansfield

ZIP codes with the USPS city name Port Mansfield
ZIP City Type Population Median income Median home
78598 Port Mansfield , TX Standard 245 — —

Map of Port Mansfield ZIP codes

78598

The ZIP codes of Port Mansfield, TX, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Port Mansfield

The nearest larger towns are San Perlita (462 people, 13 mi), Raymondville (10,185 people, 22 mi) and Los Angeles (553 people, 22 mi).

Towns near Port Mansfield
TownPopulationDistance
Raymondville 10,185 21.7 mi
Combes 3,178 28.4 mi

More nearby: every ZIP code in Willacy County · Texas ZIP codes

Cite this page

zipcodes.pro. “Port Mansfield, TX ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/tx/port-mansfield

Underlying data is public domain or openly licensed — sources, vintages and licences.