Sigmund Eisner (February 14, 1859 – January 5, 1925) was a prominent manufacturer and president of the Sigmund Eisner Company based in Red Bank, New Jersey. At one time (1922), this company was the exclusive manufacturer of uniforms for the Boy Scouts of America and the largest manufacturer of uniforms in the United States. He is also known as the great-grandfather of Michael Eisner, who was CEO of The Walt Disney Company from 1984 to 2005.