Carlos St. John Phillips (born August 26, 1986), known professionally as Saint Jhn (stylized as SAINt JHN; pronounced "Saint John"), is a Guyanese-American rapper and singer.

He is best known for the 2019 remix to his 2016 song "Roses". The remix, produced by Kazakh DJ Imanbek, reached the top 5 of the US Billboard Hot 100 and topped the charts in Australia, Canada, the Netherlands, Ireland, New Zealand, and the United Kingdom. The song became the lead single for Saint Jhn's third studio album, While the World Was Burning released on November 20, 2020. Prior, he released his debut album Collection One (2018), its follow up, Ghetto Lenny's Love Songs (2019) through the L.A. Reid's label Hitco.

He has written songs for artists including Kanye West, Jidenna, Usher, Hoodie Allen, and Kiesza, among others. He is a founding member of the music collective Gødd Complexx.