David Longstreth (born December 17, 1981) is an American singer and songwriter. He is the lead singer and guitarist for the band Dirty Projectors.

Longstreth was born in Southbury, Connecticut. Longstreth attended Yale University and majored in music shortly before dropping out halfway through his second year. He stated that "he rarely ventured out of his dorm room. He found himself completely absorbed in making his own music, though there wasn’t really anyone to play it for." After dropping out, he moved in with his brother in Portland, Oregon, and worked on his first album, The Graceful Fallen Mango, which he released in 2002. Shortly after completing the album, Longstreth returned to Yale to finish his degree and began making music under the Dirty Projectors title. He proceeded to record multiple records under the name during his time at Yale.

In 2015, he contributed to "FourFiveSeconds," a collaborative song by Rihanna, Kanye West, and Paul McCartney. That same year, he composed a classical composition called "Michael Jordan." It was composed for the New York group Ensemble LPR. He also contributed to the orchestral arrangement for the song "Time, As a Symptom" on the album Divers by American musician Joanna Newsom. In 2016, he produced the album Azel by Nigerien musician Bombino and collaborated on the Solange release, A Seat at the Table.

In January 2025, he released a David Berman covers EP.

Longstreth is the younger brother of American painter, musician, and internet radio personality Jake Longstreth.

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