County Dossier

Nassau County

New York | County

Population

1,389,591

Land Area

284.5 sq mi

Context

Metro

Geography

County silhouette

Land Area
284.5 sq mi
Water Area
168.8 sq mi
Water Share
37.2%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

1,389,591

Density
4,883.6 / sq mi
Households
458,166
Housing Units
479,044
Median Age
42.0 years

Income & Economy

Median Household Income

$146,202

GDP

$130.22B

Real GDP Change+0.1%
Per Capita Income
$64,198
Personal Income
$152.33B
Personal Income Per Capita
$109,400

Classification

RUCC 1
Metro

Counties in metro areas of 1 million population or more

Relief

Min

0 ft

Mean

56 ft

Max

366 ft

Provenance

GEOID 36059 ANSI 00974128
Latitude 40.72961 Longitude -73.58941
Canonical 2025 Gazetteer ACS ACS 2020-2024 5-year BEA BEA county 2024 release (2026-02-05) BLS BLS LAUS 2024 annual average USDA USDA RUCC 2023 USGS USGS 3DEP published as of 2026-03-23