Award Borestone Mountain Poetry Award

Hopwood Award (1956, 1957)

Arthur C. Clarke Award (1993)

Golden Rose Poetry Prize (1990)

Paterson Poetry Prize (2000)

Sheaffer-PEN/New England Award (1989)

May Sarton Award (1991)

Carolyn Kizer Poetry Prize (1986, 1990)

Brit ha-Darot Award (1992)

Barbara Bradley Award (1992)

American Academy of Arts and Letters Academy Award (Literature, 1957)

National Institute of Arts and Letters Award (Literature, 1957)

National Council for the Arts award

Poet Laureate Consultant in Poetry to the Library of Congress (1978-1980)

Air Medal (2)

Harriet Monroe Memorial Prize (1944)

Van Wyck Brooks Award (1971)

Loines Prize (1966)

International Vaptsarov Prize for Literature (1979)

Connecticut College Medal (1996)

Oscar Blumenthal Prize (1953)

Carl Sandburg Award (1979)

National Endowment for the Arts Senior Fellowship in recognition of life's work (1984)

Guggenheim fellow (1975-76)

Academy of American Poets fellowship (1990)

Honorary Bulgarian Citizenship (1996)

Laurel Poetry Series (editor)

Lifetime Achievement Award (Connecticut Commission on Culture and Tourism, 2007)