The district includes parts of Attala, Holmes and Yazoo counties, which is located in central Mississippi.
In 1967, his father was elected as the first post-Reconstruction era black state legislator in Mississippi, serving until 2003.
After completing high school, he attended Holmes Community College in Goodman, Mississippi where he received his Associate of Arts degree in 1995.
In 1998, he graduated magna cum laude from Mississippi Valley State with a Bachelor of Science degree in biology.
In December 2002, he received his Juris Doctor degree from the Mississippi College School of Law.
Clark is the President of the Holmes County Branch of the National Association for the Advancement of Colored People (NAACP).
Robert Clark Jr. was the first African American elected to the Mississippi State Legislature since the Reconstruction era and was reelected through the following three-plus decades.