William Schuyler Jackson (died November 23, 1932, in Jamaica, Queens, New York City) was an American lawyer and politician.
In 1892, he married a daughter of Buffalo shoe dealer T. B. Staley.
He was First Assistant District Attorney of Erie County when he was elected New York State Attorney General on the Democratic and the Independence League tickets in November 1906.
In February 1907, when he was just a month in office, his wife retained Edward E. Coatsworth (the former law partner of William F. Sheehan, Charles F. Tabor and John Cunneen) and announced she would sue for divorce.
In 1920, he sent a letter to Governor Al Smith, protesting against the expulsion of five Socialist members (among them Louis Waldman and Sam Dewitt) from the New York State Assembly.