Robert Knowles may refer to:
Robert P. Knowles (1916–1985), American politician, member of the Wisconsin Senate Robert E. Knowles (1925–1988), American politician, member of the Florida House of Representatives. Robert Edward Knowles (1868–1946), Canadian writer and clergyman. Robert Knowles (parasitologist) (1883–1936), British parasitologist Rob Knowles (born 1947), Australian politician Captain Robert Knowles, a fictional character in Bernard Cornwell's Sharpe series Robert Knowles (entomologist), see Timeline of entomology since 1900
See also Robert Knolles (–1407), English knight of the Hundred Years' War Robert Knollys (disambiguation), same pronunciation