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Grand Isle town, LA

ZIP Code 70358 — Grand Isle town, LA Demographics & Data

Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.

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Map, Quick Facts & Location

Quick Facts

Local time
Population
644
Median Income
N/A
Home Value
$266,100
-24% vs US avg
Median Rent
$1,118
-4% vs US avg
Median Age
54.0 yrs
+39% vs US avg
Area Code
Congress
Top Ancestry
FrenchGermanEnglish
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Location
Coordinates
29.2147, -90.0275
Elevation
5 ft
Land Area
6.4 sq mi
Water Area
5.3 sq mi (45% water)

At a glance

Population
644
Density
N/A
Median income
N/A
Home value
$266,100
-24% vs US avg
Median rent
$1,118
-4% vs US avg
Timezone

Overview of ZIP Code 70358

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What to know about ZIP 70358

ZIP code 70358 covers Grand Isle, LA in Jefferson Parish with a population of about 644.

At a glance, the area shows median age of 54.0 versus a U.S. median of about 38.9.

It sits in telephone area code 985; U.S. House district LA-1; the NEW ORLEANS media market.

Income and economy in Grand Isle, LA

On socioeconomic markers, US5 shows a poverty rate of 31.3%; unemployment rate near 7.3%; 23.8% of adults with a bachelor’s degree or higher (about 10.0 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Administrative support, Mining, and Transportation; about 0.3% of workers reporting work-from-home (about 14.9 points below the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Housing and affordability in ZIP 70358

Median home value is about $266,100 — about 24% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,118 (about 4% below the U.S. median rent ($1,163)), and owner-occupancy near 75.7% (about 10.3 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 70358 in Grand Isle, LA, a household would need roughly $73,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $1,709. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

Climate risk and migration signals

Climate normals for Grand Isle town, LA show little to no average snow and around 66.7 inches of annual precipitation.

IRS migration statistics show a net inflow of about 25 for ZIP 70358 (Grand Isle town, LA) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.

Nearby (from this ZIP)

Airport NBG (42.2 miles (67.9 km)) · University of Holy Cross (48.2 miles (77.6 km)) · Jean Lafitte National Historical Park and Preserve (42.2 miles (67.9 km)) · VA: Houma CBOC (50.0 miles (80.4 km))

Full lists and map pins are in the Infrastructure section below.