Davis Kasey Tutt (c. 1836 – July 21, 1865) was an American Old West gambler and former soldier, best remembered for being killed during the Wild Bill Hickok – Davis Tutt shootout of 1865, which launched Wild Bill Hickok to fame as a gunfighter.

Enlisting in 1862 in Company A, 27th Arkansas Infantry Regiment, Davis Tutt fought for the Confederate States of America in the Trans-Mississippi Theater during the American Civil War.

At its end, he decided to go west, stopping first in Springfield, Missouri, where he met Wild Bill Hickok.

Historians have debated the amount, but Hickok himself stated he owed Tutt $25.

Hickok allowed Tutt to take it, but warned him to never wear it in public.