Charles Dayan (July 8, 1792 – December 25, 1877) was an American lawyer and politician.

Afterwards he studied law, was admitted to the bar in 1817, and practiced in Lowville.

He was President pro tempore of the State Senate and Acting Lieutenant Governor of New York from October 17 to December 31, 1828.

Dayan was a presidential elector in 1828, voting for Andrew Jackson and John C. Calhoun.

He retired from public life because of ill health, but continued the practice of law.