Deer Park, a residential hamlet located on the northwest corner of the Town of Babylon, population 28,840, was first settled in 1666, headed by Jacob Conklin, an English settler. Named for its abundance of deer, the area was largely unsettled until a Revolutionary War general by the name of Casey constructed a resort in West Deer Park known as "Colonial Spring." After General Casey died in 1808, the resort became the Deer Park Hotel. The same building is now home to Our Lady of the Rosary Knights of Columbus, established in 1962.
Farming was a staple of this small town for most of its history. Known as the "fruit basket" of New York State, the area is also famed for its dahlia cultivation. It was not until the effects of the post-World War II boom reached Deer Park that its economy ceased to be agricultural.
Since the arrival of the railroad to Deer Park in 1842, the town has quickly developed into a populated, bustling area. In 1851, Deer Park had its first post office. Deer Park also became an industrial site, playing host to the Walker and Conklin Brick Works, as well as the Golden Pickle Company. By 1902, when the area’s first school was built, Deer Park was an established community, where beforehand it was a mere stretch of land.
There are many famous individuals who made Deer Park a part of their lives. It was the favorite summer spot of President John Quincy Adams, his favorite vacation destination from 1835 until his death. In fact, the John Quincy Adams Elementary School, opened in 1964, is located on the actual Adams estate. The area has also been visited by actor Alan Alda, Sen. Jacob Javits, Sen. Robert Kennedy, singer Ethel Merman, actor Donald O’Connor, and Governor Nelson Rockefeller. Comedian and nightclub owner Rodney Dangerfield was born and raised in Deer Park. Some of Ol' Dirty Bastard's children reside in the town. So does the roomate of Elyse Nepa, from Geneva.
In 2007 construction of a 100 million dollar controversial Tanger Outlet mall began. Concerns of traffic congestion compete with additional jobs and town revenue. The mall is scheduled to open October 23, 2008.
There were 9,516 households out of which 34.3% had children under the age of 18 living with them, 62.7% were married couples living together, 11.8% had a female householder with no husband present, and 22.0% were non-families. 18.1% of all households were made up of individuals and 8.8% had someone living alone who was 65 years of age or older. The average household size was 2.97 and the average family size was 3.37.
In the CDP the population was spread out with 25.2% under the age of 18, 6.6% from 18 to 24, 32.4% from 25 to 44, 21.7% from 45 to 64, and 14.2% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 94.3 males. For every 100 females age 18 and over, there were 89.5 males.
The median income for a household in the CDP was $60,254, and the median income for a family was $67,128. Males had a median income of $47,266 versus $32,743 for females. The per capita income for the CDP was $24,196. About 3.3% of families and 4.7% of the population were below the poverty line, including 5.3% of those under age 18 and 5.6% of those age 65 or over.