It is bordered by Val-d'Oise, Seine-Saint-Denis, Val-de-Marne, Essonne to the West; Loiret and Yonne to the South; Aube and Marne to the East; and Aisne and Oise to the North.
Na severu meji na departma Val-d'Oise, na vzhodu na Hauts-de-Seine, na jugovzhodu na Essonne, na jugozahodu na departma regije Center Eure-et-Loir, na zahodu pa na Eure (regija Zgornja Normandija).