William I of Geneva (c. 1132 – 25 July 1195) was Count of Geneva from 1178 to 1195.
He was the son of Amadeus I, Count of Geneva and Matilda de Cuiseaux.
[1] William married Agnes of Savoy.
[1] They had: Following his first wife's death c. 1172,[2] William married Marguerite Beatrice de Faucigny,[1] they had: William's third marriage, to Beatrice de Vaupergue, his last wife, was childless.
He died at the Château de Novel in Annecy, France.