Leonard Edward Andera (May 17, 1934 – February 7, 2012) was an American politician who served in the South Dakota Senate from 1985 to 1990.

He obtained a teaching certification from Wessington Springs Junior College upon graduation from high school.

After his discharge from the army, Andera attended the University of South Dakota, where he earned a bachelor's and a master's degree.

While pursuing his legal education, Andera served as a deputy sheriff for Clay County.

He was later named South Dakota's commissioner of drug control, which he left for the securities commission.