Bonanza is an extinct hamlet in central Caldwell County, in the U.S. state of Missouri.
A post office called Bonanza was established in November 2nd, 1881, by Manford F. Kern, and remained in operation until October 31st, 1903. Bonanza is a name derived from the Spanish language.
The town was settled along Shoal Creek and just southwest of its former location is Bonanza Conservation Area.