Paul-Henri-Benjamin d'Estournelles de Constant, French politician and diplomat, Nobel Prize laureate (d. 1924)

Paul Henri Benjamin Balluet d'Estournelles de Constant, Baron de Constant de Rebecque (22 November 1852 – 15 May 1924), was a French diplomat and politician, advocate of international arbitration and winner of the 1909 Nobel Prize for Peace.