Jack Yellen (Jacek Jeleń) (July 6, 1892 - April 17, 1991) was a Polish born American lyricist.

Yellen's family immigrated to the United States when he was five. He attended the University of Michigan and on graduating became a reporter on the Buffalo Courier. He is best remembered for his collaboration with composer Milton Ager. He and Ager entered the music publishing business as part owners of the Ager-Yellen-Bernstein Music Company.

He died in Concord, New York.

Broadway musicals

• What's in a Name? (1920) with music by Milton Ager
• Rain or Shine (1928) with music by Milton Ager
• Follow A Star (1930) with music by Vivian Ellis
• You Said It (1931)
• George White's Scandals of 1935
• George White's Scandals of 1939
• Boys and Girls Together (1940)

Songs

• Alabama Jubilee 1915
• Louisville Lou 1923
• Hard Hearted Hannah (The Vamp Of Savannah) 1924
• I Wonder What's Become of Sally 1924
• Cheatin' on Me 1925
• In Your Green Hat 1925
• My Yiddishe Momme 1925 with music by Lew Pollack. A huge success for Sophie Tucker.
• Crazy Words, Crazy Tune 1926
• Ain't She Sweet 1927
• Happy Days Are Here Again 1930