South Amboy Demographics:

As of the 2010 United States Census, there were 8,631 people, 3,372 households, and 2,256 families residing in the city. The population density was 5,577.1 inhabitants per square mile (2,153.3 /km²). There were 3,576 housing units at an average density of 2,310.7 per square mile (892.2 /km²). The racial makeup of the city was 86.42% (7,459) White, 4.43% (382) Black or African American, 0.10% (9) Native American, 4.03% (348) Asian, 0.00% (0) Pacific Islander, 2.99% (258) from other races, and 2.03% (175) from two or more races. Hispanic or Latino of any race were 13.42% (1,158) of the population.

There were 3,372 households out of which 28.0% had children under the age of 18 living with them, 46.8% were married couples living together, 14.1% had a female householder with no husband present, and 33.1% were non-families. 26.7% of all households were made up of individuals and 9.6% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.11.

In the city the population was spread out with 20.8% under the age of 18, 8.6% from 18 to 24, 29.8% from 25 to 44, 29.5% from 45 to 64, and 11.3% who were 65 years of age or older. The median age was 39.3 years. For every 100 females there were 96.8 males. For every 100 females age 18 and over, there were 93.2 males.

The Census Bureau's 2006-2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $61,566 (with a margin of error of +/- $6,388) and the median family income was $80,815 (+/- $4,285). Males had a median income of $54,000 (+/- $5,767) versus $49,303 (+/- $4,574) for females. The per capita income for the borough was $31,590 (+/- $2,232). About 10.2% of families and 9.0% of the population were below the poverty line, including 15.7% of those under age 18 and 5.5% of those age 65 or over