Herman Frank Cash (July 25, 1918 – February 7, 1994) was a suspected fourth conspirator in the 16th Street Baptist Church bombing of 1963 along with Thomas Edwin Blanton Jr., Robert Edward Chambliss, and Bobby Frank Cherry, all of whom received prison sentences for their involvement in the incident. Cash died in 1994 and was never tried for his alleged involvement in the bombing.

Cash was married to Myrtle Cash and had two children, Carolyn and Maurice. He was a truck driver for Dixie-Ohio Express Company. Cash was a member of United Klans of America, a Ku Klux Klan organization. He served in the United States Army during World War II.^[1][2]

Although officially named by the Federal Bureau of Investigation as a suspect as early as 1965,^[3] Cash was never formally charged with any crime. He maintained his innocence and passed a polygraph test given by the FBI. Acquaintances claimed that Cash was too nervous to be capable of committing a crime of the magnitude of the bombing.^[1]

Cash died in 1994 in Pinson, Alabama.

• Thomas Edwin Blanton Jr.
• Bobby Frank Cherry
• Robert Edward Chambliss
• African-American history
• Civil Rights Movement
• Birmingham campaign
• Mass racial violence in the United States