Judith Viorst (/viˈɔːrst/ vee-ORST;[1] née Stahl;[2] born February 2, 1931) is an American writer, newspaper journalist, and psychoanalysis researcher.

Viorst's book Sad Underwear (published in 1995) is a collection of poems that examines a wide variety of feelings and experiences from a child's point of view.

She has written nine books of poetry including Unexpectedly Eighty and Other Adaptations, When Did I Stop Being Twenty and Other Injustices: Selected Poems from Single to Mid-Life, and People and other Aggravations.

Viorst is also a newspaper columnist and has written frequently for The New York Times and The Washington Post, and has been a contributing editor to Redbook magazine.

The Ensemble Theatre of Cincinnati hosted a performance of Love & Shrimp, starring Deb Girdler, Pamela Myers and Shelley Bamberger, in the spring of 1999.