Barney Liddell (August 13, 1921 – May 5, 2003) was an American born big band musician from television's The Lawrence Welk Show, his instrument was the trombone.

Born and raised in Gary, Indiana; Barney was the oldest of eleven children.

When he entered Horace Mann High School, he was eager to study music and play the saxophone for the school band but they were out of saxes. His second choice was the trumpet, they too were out, so eventually he settled on the trombone and began to practice hard on that instrument, like his idol Tommy Dorsey.

After graduating from high school in 1939, he attended the University of Notre Dame and spent three semesters at the University of Chicago studying engineering.

Liddell entered the Army where for the next two years he was a bugler and a radio operator. Liddell was discharged from the Army in 1945.

After being discharged from the Army, Liddell went to New York to get his musician's union card and spent the next few years playing in various bands for bandleaders such as Buddy Williams, Les Elgart, Red Allen, Glen Gray and his Casa Loma Orchestra and finally Elliot Lawrence before eventually joining Lawrence Welk in 1948.