John Doman is an American actor, and a former Marine Corps officer and Vietnam veteran. He's best known for playing Deputy Police Commissioner William Rawls on HBO series The Wire (2002-2008), Colonel Edward Galson on Oz (2001), Rodrigo Borgia in the international television series Borgia (2011–2014), Don Carmine Falcone in Fox's show Gotham (2014–2017), and Bruce Butler in The Affair (2014–2019).

On television, he's had major recurring roles as Dr. Carl Deraad on Seasons 5 and 6 of ER, as CEO Walter Kendrick on Season 2 of Damages, as Senator Ross Garrison on Person of Interest, as Aidan Moran on Feed the Beast, as Jonah Vogelbaum on The Boys, and as Robert Silas on Law & Order: Organized Crime.

He's guest starred multiple times on Law & Order and Law & Order: SVU. He's also had other guest roles on Dr Quinn Medicine Woman, Star Trek: Deep Space Nine, The Practice, Judging Amy, Law & Order: Criminal Intent, CSI, Without a Trace, Law & Order: Trial by Jury, Burn Notice, Rizzoli & Isles, Elementary, House of Cards, Instinct, City on a Hill, and For Life.

He had cameos in the films Die Hard with a Vengeance (1995), Cop Land (1997), Mystic River (2003), and Blue Valentine (2010). He's also had roles in other films including Mercury Rising, City by the Sea, You Were Never Really Here, Cold Pursuit, and The Trial of the Chicago 7.

He provided the voice of Don Morello in the video game Mafia: City of Lost Heaven, the voice of Caesar in the video game Fallout New Vegas, and the voice of Dog with Bucket Hat in the cartoon series Birdgirl.

Doman has also appeared in promotional advertisements for Versus television. The promotional videos' soundtrack is a rendition of Metallica's "One" from Apocalyptica's 1998 Inquisition Symphony album.