Perry Polk Keith, Sr. (October 20, 1847 - February 6, 1935), was a planter, developer, and a member of the Louisiana House of Representatives who was the co-founder and namesake of the unincorporated community of Keithville outside Shreveport in Caddo Parish in northwestern Louisiana. Keithville came into existence when two railroads met on Keith properties in the early 1880s, the Texas Pacific and the Houston-Shreveport, later part of the Southern Pacific.