Gallop was born in Duluth, Minnesota. He originally worked as a surveyor and draftsman. On February 24, 1971, Gallop committed suicide in Encino, California. Some records mentioned his name as Gallup.
- "Caribbean Clipper" (music by Jerry Gray)
- "Count Every Star" (music by Bruno Coquatrix)
- "The Clock in the Tower" (music by Guy Wood)
- "Elmer's Tune" (music by Elmer Albrecht and Dick Jurgens)
- "Forgive My Heart" (music by Chester Conn)
- "Half As Lovely Twice As True" (music by Lew Spence)
- "Holiday for Strings" (music by David Rose)
- "Maybe You'll Be There" (music by Rube Bloom)
- "My Lady Loves to Dance" (music by Milton DeLugg)
- "No Good Man" (music by Dan Fisher and Irene Higginbotham)
- "The Sentimental Touch" (music by Albert Van Dam)
- "Shoo Fly Pie and Apple Pan Dowdy" (music by Guy Wood)
- "Somewhere along the Way" (music by Kurt Adams)
- "There Must Be a Way" (music by David Saxon)
- "Uninvited Dream" (music by Burt Bacharach)
- "Wake the Town and Tell the People" (music by Jerry Livingston)
- "Way I Feel About You" (music by Doc Severinsen and Tommy Newsom)
- "You're Gonna Hate Yourself in the Mornin'" (music by Larry Stock and Ira Schuster)
- "Sammy Gallop". IMDB. Retrieved 17 June 2012.
- Studwell, William E. (2000). They also wrote : evaluative essays on lesser known popular American songwriters prior to the rock era. Lanham, Md.: Scarecrow. p. 204. ISBN 0810837897.
- "Sammy Gallop – Biography". Parabrisas. Archived from the original on 4 January 2012. Retrieved 17 June 2012.
- Vaché, Warren W. (2000). The unsung songwriters : America's masters of melodies. Lanham, Md.: Scarecrow Press. p. 141. ISBN 0810835703.
- O'Brian, Jack (March 12, 1971). "Rose Hasn't Given Okay". Spartanburg Herald-Journal. Retrieved June 17, 2012.
- "Sammy Gallop – Compositions". Parabrisas. Archived from the original on 2 January 2011. Retrieved 17 June 2012.
- "Sentimental Touch - Sammy Gallop". Second Hand Songs. Retrieved 18 January 2018.