She was born in Big Spring, Texas and attended the fine arts and music school at the University of Texas. She sang in the chorus of the Dallas State Fair Musicals during two summers and, after earning her Master's Degree in Voice Pedagogy, she moved to New York City.
She appeared in the original production of Frank Loesser's The Most Happy Fella on Broadway in 1956. She originally understudied the role of "Cleo" and took over the role during the Broadway run. Forty years later, Blount played “Granny Briggs” in a revised version of Loesser's Greenwillow in 1997 at the Golden Apple Dinner Theatre in Sarasota, Florida. She received a "South Florida Sammie Award" as Best Supporting Actress in a Musical.
Other Broadway credits included playing “Dee Dee West” in the original production of Stephen Sondheim's Follies (1971) (also understudying the roles of Hattie and Stella), Do I Hear a Waltz? (1965), Musical Chairs and The Fig Leaves Are Falling (1969). In Kander and Ebb's Woman of the Year (1981), which starred Lauren Bacall, Blount played several characters.  Blount also appeared in Riverwind in 1962, an Off-Broadway musical.
- Jones, Kenneth. "Helon Blount Kaldenberg, of Broadway's 'Happy Fella' and 'Follies', Dead at 76" Playbill, March 9, 2005
- " 'The Most Happy Fella' Broadway 1956" Playbill, retrieved October 13, 2017
- "Helon Blount Credits" broadwayworld.com, retrieved October 13, 2017
- Lefkowitz, David. "South Florida Sammie Awards Announced" Playbill, September 19, 1997
- Haun, Harry and Lefkowitz, David. "Sarasota 'Greenwillow' Opens June 10" Playbill, June 10, 1997
- " 'Follies' Broadway 1971" Playbill, retrieved October 13, 2017
- "Blount Broadway" Playbill, retrieved October 13, 2017
- Riverwind lortel.org, retrieved October 13, 2017