Merwin or Merwyn may refer to:

People

* Merwin (name), or Merwyn, a surname and masculine given name *

W.S. Merwin William Stanley Merwin (September 30, 1927 – March 15, 2019) was an American poet who wrote more than fifty books of poetry and prose, and produced many works in translation. During the 1960s anti-war movement, Merwin's unique craft was thema ...

(1927–2019), American poet.

Places

;United States * Merwin Dam, a hydroelectric dam in the state of Washington *

Lake Merwin Lake Merwin is a reservoir on the Lewis River in the U.S. state of Washington. It lies on the border between Clark County and Cowlitz County. It was created in 1931 with the construction of Merwin Dam. See also *List of lakes in Washington (sta ...

, the reservoir formed by the dam * Merwin, Missouri, a village * Merwin House, Stockbridge, Massachusetts, currently a museum