tʃˈeɪvneɪ, ˈɔːlsoʊ nˈoʊn æz vˈælən də tʃˈeɪvneɪ, ɪz ɐ kˈɑːmjuːn ɪnðɪ ˈɪvɪlˌaɪnz dᵻpˈɑːɹtmənt ɪnðɪ ˈaɪldəfɹˈæns ɹˈiːdʒən ɪn nˈɔːɹθsˈɛntɹəl fɹˈæns.
Chavenay (), also known as Vallon de Chavenay, is a commune in the Yvelines department in the Île-de-France region in north-central France.