Ralph Walker

Ralph Walker may refer to:
 * Ralf Marc Walker (1872–1935), a.k.a. Ralph or R.M., owner of the Fifth Street Store and Walker Scott Department Stores in California
 * Ralph C. S. Walker, former head of the Humanities Division at Oxford and Kant specialist
 * Ralph Thomas Walker (1889–1973), American architect and President of the American Institute of Architects
 * Ralph Walker (engineer) (1749-1824), Scottish civil engineer associated with London Docks
 * Ralph Walker (Neighbours), fictional character on the Australian soap opera Neighbours