Prosper Montgomery Wetmore (February 14, 1798 - March 16, 1876) was a legislator, writer and general in the New York State militia.

[4] He was instrumental in organizing the 7th regiment of National Guards in 1825 though he was forced to resign in 1827 due to some bad business dealings which "had resulted disastrously to his interest, and very prejudicially to his character.

When the Whigs came into power, he was compelled to give up the chair to his brother Robert who succeeded him.

Through the Wetmore brothers significant political influence, Marshall Owen Roberts secured a contract for naval supplies for the Port of New York.

He authored a book of poetry, Lexington, with other fugitive poems, about the battle of Lexington, and edited and wrote the prologue to the Deaf poet James Nack's book Earl Rupert, and other tales and poems.