John Price Buchanan (October 4, 1847 – May 14, 1930) was an American politician and farmers' advocate. He served as Governor of Tennessee from 1891 to 1893, and was president of the Tennessee Farmers' Alliance and Laborers' Union in the late 1880s. Buchanan's lone term as governor was largely marred by the Coal Creek War, an armed uprising by coal miners aimed at ending the state's convict lease system.