William David Frazer (January 11, 1884 – August 17, 1963) was an American sport shooter who competed in the 1924 Summer Olympics.
In 1924, he finished in 11th place in the 25 m rapid fire pistol competition.
He was born in Niagara Falls, New York and died in Seattle, Washington.
Frazer served as a colonel in the Coast Artillery Corps, U.S. Army. While a major, he authored the book American Pistol Shooting (New York: Dutton, 1929).