According to the United States Census Bureau, the city has a total area of 34.3 km² (13.2 mi²). 26.8 km² (10.4 mi²) of it is land and 7.5 km² (2.9 mi²) of it is water. The total area is 21.77% water.
As of the census of 2000, there are 72,182 people, 26,189 households, and 17,546 families residing in the city. The population density is 2,692.7/km² (6,973.5/mi²). There are 26,995 housing units at an average density of 1,007.0/km² (2,608.0/mi²). The racial makeup of the city is 67.89% White, 19.18% African American, 0.20% Native American, 3.23% Asian, 0.05% Pacific Islander, 6.28% from other races, and 3.17% from two or more races. 20.08% of the population are Hispanic or Latino of any race.
There are 26,189 households out of which 32.7% have children under the age of 18 living with them, 50.5% are married couples living together, 12.5% have a female householder with no husband present, and 33.0% are non-families. 28.0% of all households are made up of individuals and 11.8% have someone living alone who is 65 years of age or older. The average household size is 2.68 and the average family size is 3.29.
In the city the population is spread out with 24.0% under the age of 18, 8.7% from 18 to 24, 29.5% from 25 to 44, 22.2% from 45 to 64, and 15.5% who are 65 years of age or older. The median age is 37 years. For every 100 females there are 90.7 males. For every 100 females age 18 and over, there are 85.9 males.
The median income for a household in the city is $55,513, and the median income for a family is $72,723. Males have a median income of $50,187 versus $38,527 for females. The per capita income for the city is $31,956. 10.5% of the population and 7.9% of families are below the poverty line. Out of the total people living in poverty, 12.1% are under the age of 18 and 10.0% are 65 or older.
New Rochelle is the birthplace of singer, Don McLean.
Iona College is located in New Rochelle.