The suspect was described as a black male in his early 20s.
The suspect referenced being armed, but no weapon was seen during the robbery. No one was injured in the incident.
The suspect left the bank within minutes of the robbery, according to the sheriff's department, with an undisclosed amount of cash.
Bank surveillance video captured the robber. The department released still photographs of the suspect.
Anyone with information about the suspect was asked to contact Detective Jon Smith at (805) 494-8201, or FBI Special Agent Pat Conley at (310) 629-9553.
Ventura County Crime Stoppers will pay up to $1,000 reward for information that leads to the arrest and criminal complaint against the person(s) responsible for this crime. The caller may remain anonymous. The call is not recorded. Call Crime Stoppers at 800-222-TIPS (8477).