Sanborn Young devoted his energies to politics, photography, raising racing dogs and beagles, and investments. In 1925 Young was elected to the California State Senate and continued to serve there until 1939. A quiet, retiring man, it is said that he won the seat because of his wife's campaigning. While in the Senate, his primary interests were the conservation of wild animals, and legislating against narcotics. In 1929 his bill to abolish sawtooth traps except for bears was enacted.
These political ties resulted in the Youngs becoming friends of the Hoovers, who resided in nearby Palo Alto. Several letters from Hoover to the Youngs indicate that theirs was a close relationship.
Sanborn Young said of his life, "My own claim to fame is that I married Ruth Comfort Mitchell, I became a California State Senator and wrote the narcotics bill, I raised the champion beagle."