Sumner Increase Kimball (September 2, 1834 – June 20, 1923) was the organizer of the United States Life-Saving Service and the General Superintendent of the Life-Saving Service from 1878–1915. Originally a lawyer and a legislative administrator, Kimball spent his life creating and leading the Life-Saving Service, one of the predecessor services that eventually became the US Coast Guard, transforming it from an uneven collection of facilities round the US coastline into a coherent and well-trained organization.