"Cousin Kevin" is a song by the rock band The Who. It appears on side two of the rock opera Tommy. It is about a sadistic young man who is left in charge of Tommy, a "deaf, dumb, and blind" boy and decides to torture him in various ways, including burning a cigarette on his arm, dunking his head in a full bathtub, and making him "stand in the rain and catch cold so [he] die[s]."

The song may have been intended to take place during or directly after the events of the song "Christmas," as it follows directly after it in the track listing. Cousin Kevin may have been visiting for Christmas, and whilst everyone else went off to enjoy festivities, he stayed behind to torment Tommy.

The song was written and sung by bassist John Entwistle upon request of guitarist Pete Townshend. Entwistle maintained that the song was inspired by the young boy who lived across the street from Entwistle. "Fiddle About," the other song on "Tommy" about child abuse (sexual, in this case), was also written by Entwistle. The song is sung in a high register, as Entwistle didn't want frontman Roger Daltrey to sing it. Instead it is sung in harmony, following a Wagner-like structure. The song was often excluded from live performances as a result.

The character was played by Paul Nicholas in the feature film Tommy (1975).

• Tommy (1975): [1]
• "Pinball Wizard"