Nassau County is one of about 3,141 counties and county equivalents in the United States. It has 651.6 sq. miles in land area and a population density of 107.2 per square mile. In the last three decades of the 1900s its population grew by 179.6%. On the 2000 census form, 99.0% of the population reported only one race, with 7.7% of these reporting African-American. The population of this county is 1.5% Hispanic (of any race). The average household size is 2.59 persons compared to an average family size of 2.97 persons. In 2007 accommodation and food services was the largest of 20 major sectors. It had an average wage per job of $21,459. Per capita income grew by 34.4% between 1997 and 2007 (adjusted for inflation).

People & Income Overview (By Place of Residence)	Value	Rank in U.S.	Industry Overview (2007) (By Place of Work)	Value	Rank in U.S.
Population (2008)	69,835	751	Covered Employment	18,889	922
Growth (%) since 1990	58.9%	221	Avg wage per job	$34,688	783
Households (2000)	21,980	825	Manufacturing - % all jobs in County	6.4%	2102
Labor Force (persons) (2008)	35,733	728	Avg wage per job	$64,234	143
Unemployment Rate (2008)	5.4	1641	Transportation & Warehousing - % all jobs in County	4.9%	463
Per Capita Personal Income (2007)	$43,434	171	Avg wage per job	$85,347	7
Median Household Income (2007)	$56,500	300	Health Care, Social Assist. - % all jobs in County	5.4%	1803
Poverty Rate (2007)	8.9	2732	Avg wage per job	$32,238	1009
H.S. Diploma or More - % of Adults 25+ (2000)	81.0	1,265	Finance and Insurance - % all jobs in County	2.1%	1950
Bachelor's Deg. or More - % of Adults 25+ (2000)	18.9	826	Avg wage per job	$55,300	269