Frank B. Desnoyers was an American politician who served as the 27th mayor of Green Bay, Wisconsin, from 1896 to 1898.
His father, Francis, had previously been Mayor of Green Bay.
In 1923, he married Augusta Nixon of Ashland, Virginia.
Desnoyers served as Mayor of Green Bay from 1896 to 1898.
Later, he served as a Green Bay City Councilman and Treasurer of Brown County, Wisconsin.