Charles Eastman (1858–1939) was a Santee Dakota physician, writer, national lecturer, and reformer.
Charles Eastman may also refer to:
Charles K. Eastman (1929–2009), American screenwriter and script doctor Charles M. Eastman (1940–2020), American professor of architecture Charles R. Eastman (1868–1918), American geologist and palaeontologist Charles S. Eastman (1864–1939), American politician and lawyer Charles Eastman (shot putter) (born 1903), American shot putter, 2nd at the 1923 USA Outdoor Track and Field Championships