Hamilton Leithauser (born 1977-1978) is an American singer, songwriter and multi-instrumentalist. He is best known as the former lead vocalist of the American indie rock band The Walkmen, with whom he recorded seven studio albums. Prior to The Walkmen's formation, Leithauser and bass guitarist and organist Peter Matthew Bauer were both members of The Recoys. In 2016, he formed Hamilton Leithauser + Rostam with Rostam Batmanglij, formerly of Vampire Weekend.