Wyandanch (/ˈwaɪənˌdæntʃ/, WY-ən-danch) is a hamlet and census-designated place (CDP) in the Town of Babylon in Suffolk County, New York, United States.

The northeast section of the town of Babylon "pine brush and plain" was deeded to Huntington by the Secatogue Indians in the Squaw Pit Purchase of 1699.

Lorena Frevert reported in 1949 that in the Baiting Place Purchase the Massapequa Indians "reserved the right of fishing and 'gathering plume and hucel bearyes'.

Gradually, pioneers from Huntington began settling along the southern slope of the Half Way Hollow Hills as they purchased farm and forestlands from the Conklins.

[7] The LIRR built the original West Deer Park railroad station, which incorporated a post office, in May 1875 at the request of General James J. Casey, a brother-in-law of President Ulysses S. Grant.

In 2011, 14-year-old Michael Berdon, a descendant of Jacob Conklin, restored the 257-year-old cemetery and laid a brick path approach to the gravesite with the assistance of several local businesses.

[15][16] On March 8, 1907, the Wyandanch post office was moved from the LIRR depot to Anthony Kirchner's General Store and Hotel on Merritt Avenue diagonally across from the railroad station.

About a hundred "honest and frugal" German and Austrian-American families lived in Sheet Nine of the "City of Breslau" neighborhood as early as the 1880s.

The newcomers wanted to escape from the crowded and economically depressed conditions in Manhattan and The Bronx, and yet be within an hour's ride of the "City" on the LIRR.

[18] More affluent and prominent Irish-American families in Wyandanch lived nearer the "village" in more prosperous homes with larger plots of land.

Many of these families—both middle class and working class—purchased homes in Wyandanch because they were denied opportunities to move into other fast-developing white housing tracts on Long Island (such as Levittown) due to exclusionist real estate practices: steering, restrictive covenants, red-lining or price points.

The 59 first stage homes with basement, hot-water heat and tile baths sold for $7,200 and were eligible for Federal Housing Administration loan insurance.

[22] The building of Carver Park and then the construction of Lincoln Park in 1956, with over 400 homes combined, triggered the transformation of Wyandanch from a mostly working class white community in 1950 to a majority working class African-American community in 1960, and in turn this caused white flight: many of the whites who lived south of the LIRR moved and lower middle class African-Americans bought or built modest, individual homes in Wyandanch Springs Park and in the "Tree streets" area east of Straight Path.

Hispanic-American families began to settle in Wyandanch in the late 1940s since the community offered affordable housing and land, within easy commuting distance of nearby defense plants and Pilgrim, Edgewood, Central Islip, and Kings Park State Psychiatric Centers - where jobs were plentiful.

Over the first three nights of August 1967, racial disturbances broke out in Wyandanch as small groups of young African-American adults reportedly smashed windows in three stores, overturned two cars, set fire to the auditorium of the (now named) Martin Luther King, Jr.

The U.S. Office of Economic Opportunity and its Wyandanch Community Action Center worked to improve bus routes, develop job training programs and assist the indigent with accessing government services.

The Great Atlantic & Pacific Tea Company (A&P) built a modern supermarket in downtown Wyandanch at the corner of Straight Path and Long Island Avenue.

Genovese Drugs opened a modern new store on the east side of Straight Path north of the Blue Jay shopping center.

In the 1950s, some or all of Wyandanch and its neighbors Dix Hills and Melville, along with the area known as Sweet Hollow, proposed to incorporate as a single village.

Topographically, Wyandanch's nutrient-poor loam and sandy soils are part of the outwash plain which was formed as the last glacier melted about 10,000 BCE.

The outwash plain slopes gently towards Belmont Lake State Park from the Half Way Hollow Hills terminal moraine and from Little East Neck Road.

[citation needed] In the mid and late 20th century, the Wheatley Heights area (Half Hollow Hills School District) developed as a separate community (due to class and racial dynamics) but is still served by the Wyandanch Fire Department and the US Postal Service.

What is now called Long Island Avenue (established in 1895) was originally known as Conklin Street, designed to provide easier access between the village of Farmingdale and the new real estate sites in the future Wyandanch.

The parkway (abandoned in 1938) was dug up and the bridges demolished in the early 1960s to make room for the Westwood Village housing estate in Wheatley Heights.

The filed lot sub-divisions south of the LIRR and east of Straight Path were known as the Colonial Springs Development Corp property.

The superintendent noted that "the uprooting of culturally disadvantaged students to schools where the educational program is planned for the middle class would have damaging effects on our community's children."

The two-story, red brick, eight-classroom day care center was constructed with a $1 million loan from the New York State Social Services Department.

[62][63][64] On March 12, 2012, Newsday reported that the Town of Babylon will be building a larger, more modern Head Start facility at 20 Andrews Avenue in downtown Wyandanch.

In 1946, Babylon cut the brush around the lake, dredged and cleared it, and rehabilitated "a sturdy log cabin" into concession and comfort stations.

One of the major complaints voiced by young adults in Wyandanch after the August 1967 unrest was the lack of positive recreational activities.