The names of David Yost’s parents are unknown.
He was born in Council Bluffs, Iowa. He moved around the United States while winning many national gymnastics competitions, most notably the state championships in Iowa and Montana.
In 1987, he graduated from Amador Valley High School in Pleasanton, California. In 1991, he graduated from Graceland University in Lamoni, Iowa with a Bachelor of Arts in communication and dramatic arts.
Yost was the only cast member to appear in every episode of the original series; his character never changed his colours or passed on his power coins to successors like the rest of the original cast.
In 2017, he starred in the short film, The Order alongside other former Power Rangers co-stars.