An American lyricist and composer, Ren Shields (1868–1913) was a prominent figure in early 20th-century popular music. He is best known for penning the lyrics to numerous hit songs, including "In the Good Old Summer Time" and "Come Take a Trip in My Airship," which became staples of vaudeville and early jazz ensembles. His contributions helped shape the sound and themes of American popular music during the Tin Pan Alley era.