Long Island National Cemetery is a United States National Cemetery located in Suffolk County, New York. It is surrounded by a group of other separate cemeteries and memorial parks situated along Wellwood Avenue – these include Pinelawn Memorial Park, St. Charles / Resurrection Cemeteries, Beth Moses, New Montefiore and Mt. Ararat Cemeteries. Its mailing address is Farmingdale. It borders East Farmingdale along its western edge and is located within the CDPS of Wyandanch, in the Town of Babylon, and Melville in the Town of Huntington. Administered by the United States Department of Veterans Affairs, it encompasses 364.7 acres (147.6 ha), and as of 2021, had more than 357,000 interments.

William Henry Thompson was a United States Army soldier and a posthumous recipient of the United States military's highest decoration, the Medal of Honor, for his actions in the Korean War.