Joseph Warren Keifer (January 30, 1836 – April 22, 1932) was amajor general during theSpanish–American War. He was aU.S. politician during the 1880s. He served in theUnited States House of Representatives as aRepublican fromOhio from 1877 to 1885 and from 1905 to 1911. From 1881 to 1883 he wasSpeaker of the House.