Halsey was born in New York, New York on April 11, 1853. He was appointed to the United States Naval Academy in 1869 and graduated in 1872. Halsey married Anne Masters Brewster and on October 30, 1882, his son, William F. Halsey, Jr. was born in Elizabeth, New Jersey.
As a lieutenant, Halsey was stationed on the USS New York and assumed command of the USS Newark in May 1898.
He is buried in Arlington National Cemetery. His wife Anne, who died on May 25, 1947 is buried with him, and his son, who died on August 16, 1959 is buried beside him.
| Ensign | Lieutenant Junior Grade | Lieutenant | Lieutenant Commander | Commander | Captain |
|---|---|---|---|---|---|
| O-1 | O-2 | O-3 | O-4 | O-5 | O-6 |
| July 1874 | March 1883 | March 1886 | Unknown | Unknown | Unknown |
