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Zip Code 70056 — Gretna, LA

70056 is a ZIP Code associated with Gretna, LA, located within Jefferson. 70056 ranks #3 out of 17 ZIP codes in Jefferson County by population (and #14 out of 539 in LA). The area supports an estimated population of 40,348 residents across Data Pending housing units, with a population density of 2,303.0 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (29.888480, -90.030280)

Data MetricLocal Statistic
Postal / Zip Code70056
Primary CityGretna
State / ProvinceLA
CountyJefferson
Total Population40,348
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2,303.0 people/sq mi
TimezoneAmerica/Chicago

How 70056 Compares

MetricZIP 70056Jefferson CountyLA State Average
Population40,348430,920 (Total)4,611,457 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density2,303.0 /sq mi----
County Pop Rank#3 of 17----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 70053Gretna2.3 mi16,621N/A
Zip 70058Harvey2.5 mi39,578N/A
Zip 70114New Orleans3.4 mi22,659N/A
Zip 70130New Orleans4.1 mi12,560N/A
Zip 70131New Orleans4.4 mi25,151N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →