Walter Darwin Coy (January 31, 1909 – December 11, 1974) was an American stage, radio, film, and, principally, television actor, arguably most well known as the brother of John Wayne's character in The Searchers (1956).

He appeared on many other western television programs, including Cheyenne, Bronco, Cimarron City, The Lone Ranger, The Life and Legend of Wyatt Earp (one episode as Ben Thompson), Shotgun Slade, The Deputy, Bonanza, Bat Masterson, The Adventures of Jim Bowie, Trackdown, Tales of Wells Fargo, Yancy Derringer, Laramie, Two Faces West, Lawman, Wanted: Dead or Alive, The Restless Gun, The Rough Riders, Dick Powell's Zane Grey Theatre, Pony Express, Rawhide, Mackenzie's Raiders, Have Gun – Will Travel, The Texan, The Man from Blackhawk, Hotel de Paree, Overland Trail, Maverick, The Virginian, The Big Valley, Bat Masterson, Laredo, The Outcasts, Wagon Train (five times), and Robert Conrad's The Wild Wild West.

Coy portrayed Jason Farrel in the ABC soap opera Flame in the Wind (1965),[6] King Zorvac in the syndicated science fiction series Rocky Jones, Space Ranger (1954)[7]: 905  and Jason in the ABC serial A Time for Us.

Marshal, Rescue 8, The Lineup, East Side/West Side, Mr. Adams and Eve, Mike Hammer, The Defenders, The Man from U.N.C.L.E., Navy Log, Tightrope, Lock-Up, Lassie, Ironside, M Squad, and I Spy.

Coy also appeared in two comedies, McKeever and the Colonel and Hazel, and was cast in the automotive history movie, The Studebaker Story (1953-uncredited role) Coy's last television role was as Chief Blackfish on the NBC series Daniel Boone[5] in the 1970 episode "How to Become a Goddess".