John Kelsay (October 23, 1819 – January 19, 1899) was an American politician and judge in Oregon.

A Kentucky native, he was a member of the 1857 Oregon Constitutional Convention and served in the Missouri General Assembly.

[1] There the family settled in Corvallis, Oregon where Kelsay set up a law practice.

Shortly after arriving, he organized one regiment of troops to serve battling the Rogue River tribe in southwestern Oregon and earned the title of colonel.

[1] Kelsay was elected to the Missouri House of Representatives and served in 1844 as a delegate from Morgan County.