Paterson is an epic poem by American poet William Carlos Williams published, in five volumes, from 1946 to 1958. The origin of the poem was an eighty-five line long poem written in 1926, after Williams had read and been influenced by James Joyce's novel Ulysses. As he continued writing lyric poetry, Williams spent increasing amounts of time on Paterson, honing his approach to it both in terms of style and structure. While The Cantos of Ezra Pound and The Bridge by Hart Crane could be considered partial models, Williams was intent on a documentary method that differed from both these works, one that would mirror "the resemblance between the mind of modern man and the city."

An epic poem, or simply an epic, is a lengthy narrative poem typically about the extraordinary deeds of extraordinary characters who, in dealings with gods or other superhuman forces, gave shape to the mortal universe for their descendants.