Jack Micheline (born Harvey Martin Silver; New York, 1929 – San Francisco, 1998) was an American poet and painter, one of the original Beat poets of San Francisco and an active figure in the city's poetry revival of the 1950s and 1960s. Born in the Bronx to a family of Russian and Romanian Jewish descent, he took his pen name from the writer Jack London and his mother's maiden name.
In the 1950s he settled in Greenwich Village and became a street poet. His verse drew on the rhythms of Harlem blues and jazz and focused on prostitutes, addicts, workers and the dispossessed. In 1958 his first book, River of Red Wine, appeared with an introduction by Jack Kerouac, who praised the free swing of his style. In the early 1960s he moved to San Francisco, where he spent most of the rest of his life and published more than twenty books, some as mimeographs and chapbooks.
Despite his association with the Beats, he rejected the label and regarded the movement as a product of media hype. He also painted, mainly in gouache, in a self-taught primitive style he picked up in Mexico City. In 1968 a short story of his, "Skinny Dynamite", printed in a supplement to a Los Angeles alternative newspaper, led to its editor's arrest for obscenity, though he was not convicted. He died of a heart attack on a BART train in 1998. His legacy lives on mainly in his street poetry and in the wall murals shown at San Francisco's Abandoned Planet bookstore.