Jack Segal (October 19, 1918 – February 10, 2005) was an American pianist and composer renowned for his contributions to popular American music. Born in Minneapolis, Minnesota, Segal pursued a bachelor's degree in political science from the University of Wisconsin and a master's degree from the New School for Social Research, where he also studied creative writing. He began his songwriting career in the music department of Paramount Pictures in the mid-1940s, and his work soon caught the attention of artists like Nat King Cole and Boyd Raeburn.

Segal is best known for writing the lyrics to "Scarlet Ribbons," a ballad composed with Evelyn Danzig Levine, which became widely popular after being recorded by Harry Belafonte in 1956. His other notable songs include "When Sunny Gets Blue," "May I Come In?," and "When Joanna Loved Me." Throughout his career, Segal's compositions were recorded by a variety of artists, including Frank Sinatra, Barbra Streisand, and Tony Bennett, and his songs have reportedly helped sell 65 million records.

In addition to his songwriting, Segal contributed music to film and television soundtracks, including Star Trek: Deep Space Nine. Later in life, he taught songwriting at California State University, Northridge, and the University of Southern California. Segal passed away in Tarzana, Los Angeles, California, at the age of 86, leaving behind his wife, Helen Segal, and their four children.