RC3

RC3, or variants may refer to:


 * RC3: River City Cycling Classic, an cycling omnium in Eastern Washington, United States.
 * RC3: precision running fits, a class of engineering fit used in the United States
 * Republic RC-3 Seabee, an amphibious sports aircraft
 * SJ Rc3, a model of SJ Rc class electric locomotive used in Sweden
 * State Highway RC-3 (Puducherry), a state highway in Puducherry, India; see List of state highways in Puducherry
 * RC3, one of six RC algorithms, symmetric-key encryption algorithms invented by Ron Rivesta
 * rC3 (Remote Chaos Experience), remote events of the Chaos Communication Congress in 2020 and 2021
 * RC3 or Reginald Cornelius III, a fictional character in Knight Rider (season 4)
 * Roberto Carlos, Brazilian former professional footballer