The average household size was 2.71, and the average family size was 3.27. Age distribution was 29.1% under the age of 18, 7.3% from 18 to 24, 25.9% from 25 to 44, 25.6% from 45 to 64, and 12.2% 65 or older. The median age was 38 years. For every 100 females, there were 86.7 males. For every 100 females age 18 and over, there were 82.1 males. The median household income was $205,781, the average household income was $340,448, and the median per capita income was $116,698—making it one of the wealthiest and most affluent places with more than 1,000 households, or a population greater than 1,000, in the United States. Median income is currently ranked 16th highest in the country. Males had a median income of $100,000, versus $61,184 for females. The per capita income for the village was $116,698 and the average family income was $417,772. About 1.7% of families and 2.7% of the population were below the poverty line, including 1.6% of those under age 18 and 2.9% of those age 65 or over. In 2016, Forbes named it one of the ten most expensive suburbs of America's major cities. Bronxville's 10708 ZIP code covers the village of Bronxville proper, plus Chester Heights and other sections of Eastchester, parts of Tuckahoe, and Lawrence Park West, Cedar Knolls, Armour Villa, and other sections of Yonkers. These areas are collectively known as "Bronxville P.O." and are not located with-in the boundaries of the Village of Bronxville, therefore their residents are not considered residents of the village despite sharing the same zip code. This brings the ZIP code's population to 22,411 (2000 census), covering an area more than twice as large as the municipality of Bronxville itself and encompassing several notable institutions, such as Sarah Lawrence College in Yonkers. In fact, there are more residents of Yonkers using a Bronxville mailing address than living in the village itself. The Bronxville Post Office serves residents of the village. Bronxville is home to Concordia College, a liberal arts college operated by the Lutheran Church–Missouri Synod. Adjacent to the Concordia College campus is the Chapel School—a pre-K-8 school affiliated with the Lutheran Church-Missouri Synod.