John Estill Vickery (born November 3, 1950) is an American actor known for his work in Babylon 5 and Star Trek.

In Babylon 5, he played both Neroon and Mr. Welles. Vickery would also make a guest appearance as the latter in Crusade as Welles. His largest Star Trek role was as Rusot, a member of Damar's Cardassian resistance group, appearing in the Star Trek: Deep Space Nine episodes "The Changing Face of Evil", "When It Rains..." and "Tacking Into the Wind". He also played a Betazoid in the Star Trek: The Next Generation episode "Night Terrors" and a Klingon in the Star Trek: Enterprise episode "Judgment".

Vickery also originated the role of Scar in The Lion King Broadway stage musical. His other Broadway credits include The Sisters Rosenweig, The Real Thing and Eminent Domain. He performs frequently at the nation’s leading regional theaters including South Coast Repertory, Mark Taper Forum, The Old Globe, McCarter Theatre and Long Wharf Theatre.

His film work includes Jürgen Vsych's short film "Son for Sail".

His only anime role was the 1986 movie, Fist of the North Star. Where he provided the voice of the protagonist, Kenshiro.