John Swasey is an American voice actor, ADR director, and script writer known for his extensive work in English-language dubs of Japanese anime series. Born John Allan Swasey on October 18, 1964, in Houston, Texas, he graduated from the University of the South in Sewanee, Tennessee, with a degree in theater in 1987. His professional acting career began in live-action roles, including a brief appearance as a beer delivery guy in the 1993 film Dazed and Confused, before transitioning into voice acting.

Swasey entered the anime voice acting industry in 1997 with his debut role as the Director in episode six of the series Golden Boy for ADV Films in his hometown of Houston. This marked the beginning of a prolific career where he would become a staple voice for dubbing studios such as ADV Films, Funimation, and Sentai Filmworks. Over the years, his deep and resonant voice has become particularly associated with authoritative figures, mentors, and complex antagonists.

He is widely recognized for several major roles that have defined his career. He is the English voice of Gendo Ikari in the various iterations of Neon Genesis Evangelino, including the original ADV dub and the Rebuild of Evangelion films. For Funimation's dub of the long-running series One Piece, Swasey voices the iconic villain Sir Crocodile, a role he has reprised in numerous films including One Piece: Stampede and Episode of Skypiea. In the world of Fullmetal Alchemist: Brotherhood, he portrays Van Hohenheim, the alchemist father of the Elric brothers. His other notable roles include the eccentric Lord Death in Soul Eater, the shadowy villain All For One in My Hero Academia, and the enigmatic Undertaker in the Black Butler series.

The extensive list of roles provided is largely consistent with his credited filmography. He voices authoritative and paternal figures such as Senzaemon Nakiri in the Food Wars! Shokugeki no Soma series, Coach Nekomata in Haikyu!!, and Ganesha in Is It Wrong to Try to Pick Up Girls in a Dungeon?. He also portrays characters with a darker, more villainous edge, such as Isley in Claymore, Hades in Fairy Tail, and Gates in Full Metal Panic! The Second Raid. Other verified roles from the list include Leif Ericson in Vinland Saga, Crocodile in One Piece: Stampede, Kagimura Habaki in Blade of the Immortal, Tatsugoro in Restaurant to Another World, Dohko in Saint Seiya: Knights of the Zodiac, Mickey Simon in Area 88, Habolg in Made in Abyss, Gan Fall in One Piece: Episode of Skypiea, Danbei Hayami in Cutie Honey Universe, Daisuke Aramaki in Ghost in the Shell: The New Movie, Ivan Coral Vega in King of Thorn, Ryuga in Legends of the Dark King, Gasback in Trigun: Badlands Rumble, Oda Nobunaga in Sengoku Basara - Samurai Kings: The Last Party, the Principal in the Motto To Love Ru series, Secretary General Freeman in Project Blue Earth SOS, Ahab in Hakugei: Legend of the Moby Dick, Bann Burning in Aura Battler Dunbine, Tajimamori in RIN - Daughters of Mnemosyne, Gouzaburou Seto in My Bride is a Mermaid, Jube Nakaiya in Intrigue in the Bakumatsu - Irohanihoheto, Mister in Coyote Ragtime Show, a Narrator in Best Student Council, Hanazono in Grrl Power, Akari's Father in Diamond Daydreams, Captain Bruno J. Global in The Super Dimension Fortress Macross, Undertaker in Black Butler: Book of the Atlantic, Byron in Dragon Age: Dawn of the Seeker, Li Touten in Saiyuki Gaiden, Christiano Savonarola in Gunslinger Girl: Il Teatrino, and Meyer in TO. His role as All For One was also featured in the film My Hero Academia: Two Heroes.

In addition to his on-screen voice work, Swasey has been active behind the scenes as an ADR director and script writer since 2004. He has directed English dubs for numerous series, including Welcome to the N.H.K., Air Gear, and Saint Seiya. His work as a script adapter includes titles like Innocent Venus and Teasing Master Takagi-san: The Movie. Swasey is also the founder of Anime Dallas, an anime convention that debuted in 2018 and is held annually in Texas. He continues to be an active and sought-after voice actor, with recent roles in 2024 and 2025 including Tamagami Number Two in Dragon Ball Daima and Kim Sang-shik in Solo Leveling.