John Sparks (August 30, 1843 – May 22, 1908) was an American politician.
He was the tenth Governor of Nevada, and was nicknamed Honest John.
Like his predecessor, Reinhold Sadler, Sparks was a cattleman and his rise to political power was evidence of the decline of the mining industry and the rise of the ranching industry in Nevada.
He was a member of the Silver – Democratic Party.
In 1958, he was inducted into the Hall of Great Westerners of the National Cowboy & Western Heritage Museum.