Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/LA/UNION

Union ZIP codes, Louisiana

No ZIP code is named for Union, LA; addresses there use a neighbouring town's name. The ZIP code covering it is 70723. Its area code is 225.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
526
Area code
225

NANPA lists no telephone rate centre for Union itself, so these are the area codes of the nearest one, Convent (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Union in numbers

About 526 people live in Union, in 195 households. The median household income is $71,563 a year, 18% above the Louisiana median of $60,756 (US: $80,734). The median age is 46.3; 15.8% of adults 25 and over hold a bachelor's degree or higher (27.0% across Louisiana); the average commute takes 22 minutes.

Population526Union526
Households195Union195
Median age46.3Union46.3Louisiana38.0US 38.9
Median household income$71,563Union$71,563Louisiana$60,756US $80,734
Bachelor's degree or higher15.8%Union15.8%Louisiana27.0%US 35.7%
Mean commute21.7 minUnion21.7 minLouisiana25.7 minUS 26.4 min
Population density55 / sq miUnion55 / sq mi

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

ZIP codes covering Union

These ZIP codes cover part of Union but are addressed as somewhere else.

ZIP codes overlapping Union
ZIP City Type Population Median income Median home
70723 Convent , LA Standard 1,189 $47,444 —

Map of Union ZIP codes

70723

The ZIP codes of Union, LA, 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 Union

The nearest larger towns are Lemannville (841 people, 2.6 mi), Welcome (796 people, 2.9 mi) and Donaldsonville (6,831 people, 6.2 mi).

Towns near Union
TownPopulationDistance
Donaldsonville 6,831 6.2 mi
Gonzales 13,108 9.0 mi
Lutcher 2,991 10.7 mi
Gramercy 2,814 11.8 mi
South Vacherie 2,954 15.7 mi
Prairieville 35,238 16.2 mi
Chackbay 5,436 16.5 mi
St. Gabriel 6,639 17.2 mi
Reserve 7,791 20.0 mi
Thibodaux 15,732 20.6 mi
Old Jefferson 7,860 21.3 mi
Village St. George 8,273 21.7 mi
Shenandoah 17,998 22.9 mi
Oak Hills Place 9,038 23.0 mi

More nearby: every ZIP code in St. James Parish · Louisiana ZIP codes

Cite this page

zipcodes.pro. “Union, LA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/la/union

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