| The Guard | 2008 | Chuck | TV Show |
| To Love and Die | 2008 | Hal | TV Movie |
| Beneath | 2007 | Joseph | Movie |
| Seed | 2007 | Davis | Movie |
| Flash Gordon | 2007 | Mr. Mitchell | TV Show |
| The Still Life | 2006 | Mr. Fernot | Movie |
| Psych | 2006 | Camden McCallum Sr. | TV Show |
| Savage Island | 2005 | Keith Young (as Don Davis) | Movie |
| Child of Mine | 2005 | Police Chief | TV Movie |
| Supernatural | 2005 | Trotter | TV Show |
| Passing Darkness | 2005 | Will | Short Film |
| Miracle | 2004 | Bob Fleming | Movie |
| Stargate SG-3000 | 2004 | Computer Representation of George Hammond (voice) | Short Film |
| Meltdown | 2004 | NRC Carl Mansfield | TV Movie |
| Stargate: Atlantis | 2004 | Major General George Hammond | TV Show |
| G.I. Joe: Spy Troops the Movie | 2003 | Wild Bill (voice, as Don Davis) | TV Movie |
| NCIS | 2003 | MTAC Control Officer | TV Show |
| The Dead Zone | 2002 | Senator Harlan Ellis | TV Show |
| The Twilight Zone | 2002 | Dr. Tate | TV Show |
| Deadly Little Secrets | 2001 | The Chief | Movie |
| Hostage Negotiator | 2001 | Alexander Daniels | TV Movie |
| Just Cause | 2001 | Thorton | TV Show |
| The Chris Isaak Show | 2001 | Del | TV Show |
| Best in Show | 2000 | Mayflower Best in Show Judge | Movie |
| Suspicious River | 2000 | Golf Shirt Man | Movie |
| The 6th Day | 2000 | Cardinal de la Jolla | Movie |
| The Artist's Circle | 2000 | | Short Film |
| Andromeda | 2000 | Avineri | TV Show |
| D'Myna Leagues | 2000 | Alyouisious Jackson | TV Show |
| Atomic Train | 1999 | General Harlan Ford | TV Show |
| The West Wing | 1999 | Reverend Don Butler | TV Show |
| The Escape | 1998 | Warden (as Don Davis) | TV Movie |
| Con Air | 1997 | Fresno Man in Car (as Don Davis) | Movie |
| Dad's Week Off | 1997 | Hank | TV Movie |
| The Stepsister | 1997 | Detective Church | TV Movie |
| Tricks | 1997 | Man | TV Movie |
| Volcano: Fire on the Mountain | 1997 | Mayor Bob Hart (as Don Davis) | TV Movie |
| Honey, I Shrunk the Kids: The TV Show | 1997 | Mr. Washington | TV Show |
| Stargate SG-1 | 1997 | Major General George Hammond / Lieutenant General George Hammond / Brigadier General George Hammond / ... | TV Show |
| Alaska | 1996 | Sgt. Grazer | Movie |
| The Angel of Pennsylvania Avenue | 1996 | Dewey | TV Movie |
| The Fan | 1996 | Stook | Movie |
| Brothers of the Frontier | 1996 | Byron Holcomb | TV Movie |
| In Cold Blood | 1996 | Roy Church | TV Show |
| The Prisoner of Zenda, Inc. | 1996 | Colonel Zapf | TV Movie |
| The Limbic Region | 1996 | Chief Payne | TV Movie |
| Poltergeist: The Legacy | 1996 | Harold Taggart | TV Show |
| Profit | 1996 | Former Sheriff Crew | TV Show |
| The Sentinel | 1996 | Wilton Fisker | TV Show |
| Hideaway | 1995 | Dr. Martin | Movie |
| A Dream Is a Wish Your Heart Makes: The Annette Funicello Story | 1995 | Glen Holt | TV Movie |
| A Family Divided | 1995 | Det. Larson | TV Movie |
| Beauty's Revenge | 1995 | Sheriff | TV Movie |
| Black Fox | 1995 | | TV Movie |
| Black Fox: The Price of Peace | 1995 | | TV Movie |
| Kidz in the Wood | 1995 | Principal | TV Movie |
| Shadow of a Doubt | 1995 | Kevin Carroll Sr. | TV Movie |
| She Stood Alone: The Tailhook Scandal | 1995 | Flag panel host | TV Movie |
| The Ranger, the Cook and a Hole in the Sky | 1995 | Mr. Smith | TV Movie |
| The Marshal | 1995 | Tiger Larkin | TV Show |
| The Outer Limits | 1995 | General Callahan / Detective Wilson | TV Show |
| Max | 1994 | Earl Pomerance | Movie |
| Avalanche | 1994 | Whitney | TV Movie |
| One More Mountain | 1994 | Franklin Graves | TV Movie |
| The Diary of Evelyn Lau | 1994 | Man at Book Launch | TV Movie |
| Birdland | 1994 | Birdwell | TV Show |
| M.A.N.T.I.S. | 1994 | Admiral Farallon | TV Show |
| Viper | 1994 | Lloyd | TV Show |
| Someone Else's Child | 1994 | Sherwin Francis | TV Movie |
| Cliffhanger | 1993 | Stuart (as Don Davis) | Movie |
| Needful Things | 1993 | Reverend Rose | Movie |
| Miracle on Interstate 880 | 1993 | Dave | TV Movie |
| Without a Kiss Goodbye | 1993 | Mr. Harper | TV Movie |
| Cobra | 1993 | Sgt. Brock Thorne | TV Show |
| Madison | 1993 | Mr. Winslow | TV Show |
| The X-Files | 1993 | Captain William Scully | TV Show |
| Final Appeal | 1993 | Judge Gray | TV Movie |
| A League of Their Own | 1992 | Racine Coach Charlie (as Don Davis) | Movie |
| Hero | 1992 | Probation Officer | Movie |
| Kuffs | 1992 | Police Gun Instructor | Movie |
| Twin Peaks: Fire Walk with Me | 1992 | Maj. Garland Briggs (scenes deleted) | Movie |
| Calendar Girl, Cop, Killer? The Bambi Bembenek Story | 1992 | McCann | TV Movie |
| Dead Ahead: The Exxon Valdez Disaster | 1992 | Bill Stevens - Exxon | TV Movie |
| Highlander | 1992 | Palance | TV Show |
| Nightmare Cafe | 1992 | Sheriff Dan Filcher | TV Show |
| Chaindance | 1991 | Sergeant | Movie |
| Hook | 1991 | Dr. Fields | Movie |
| Mystery Date | 1991 | Doheny | Movie |
| Blood River | 1991 | Congressman Howard K. Apples | TV Movie |
| Captive | 1991 | Deputy Mack | TV Movie |
| Omen IV: The Awakening | 1991 | Jake Madison | TV Movie |
| Posing: Inspired by Three Real Stories | 1991 | Philip Baywood | TV Movie |
| The Gambler Returns: The Luck of the Draw | 1991 | Rodeo Announcer | TV Movie |
| Heritage Minutes | 1991 | Norris | TV Show |
| Monkey House | 1991 | Major Sutherland | TV Show |
| Street Justice | 1991 | Sargeant Pritchard | TV Show |
| Fly by Night | 1991 | Carstairs | TV Show |
| Cadence | 1990 | Haig (uncredited) | Movie |
| Look Who's Talking Too | 1990 | Dr. Fleischer | Movie |
| Waiting for the Light | 1990 | Dr. Norman (as Don Sinclair Davis) | Movie |
| Memories of Murder | 1990 | Lt. Silk (as Don Davis) | TV Movie |
| Broken Badges | 1990 | Chief Sterling | TV Show |
| Northern Exposure | 1990 | Lloyd Hillegas | TV Show |
| Twin Peaks | 1990 | Maj. Garland Briggs | TV Show |
| Beyond the Stars | 1989 | Phil Clawson (as Don Davis) | Movie |
| Look Who's Talking | 1989 | Dr. Fleisher | Movie |
| Booker | 1989 | Judge / Sheriff | TV Show |
| Bordertown | 1989 | Josiah Richmond | TV Show |
| Unsub | 1989 | Congressman Rodolski | TV Show |
| Top of the Hill | 1989 | | TV Show |
| Matinee | 1989 | Earle Gardner (as Don Davis) | TV Movie |
| The Lady Forgets | 1989 | Dr. Bennett (as Don Davis) | TV Movie |
| Watchers | 1988 | Veterinarian | Movie |
| Body of Evidence | 1988 | Gun Salesman (as Don Davis) | TV Movie |
| Malone | 1987 | Buddy (as Don Davis) | Movie |
| Stakeout | 1987 | Prison Gate Guard | Movie |
| Sworn to Silence | 1987 | Jury Foreman | TV Movie |
| 21 Jump Street | 1987 | Lt. Donnelly / Chapman / Warden / ... | TV Show |
| J.J. Starbuck | 1987 | Electrician | TV Show |
| The New Adventures of Beans Baxter | 1987 | Agent Ruck | TV Show |
| Wiseguy | 1987 | Dr. Morris | TV Show |
| Deadly Deception | 1987 | Coroner's Assistant (as Don Davis) | TV Movie |
| Sea Hunt | 1987 | | TV Show |
| L.A. Law | 1986 | Judge Richard Bartke | TV Show |
| Spot Marks the X | 1986 | Mr. Haskell (as Don Davis) | TV Movie |
| That Secret Sunday | 1986 | Customer | TV Movie |
| The Journey of Natty Gann | 1985 | Railroad Brakeman (as Don Davis) | Movie |
| MacGyver | 1985 | Wyatt Porter / Cement Truck Driver | TV Show |
| Screen One | 1985 | Bill Stevens | TV Show |
| Danger Bay | 1984 | Richard | TV Show |
| Knots Landing | 1979 | Warden Vernon Howard | TV Show |
| The Beachcombers | 1972 | Howard Usher | TV Show |
| Columbo | 1971 | Bertie | TV Show |
| The Magical World of Disney | 1954 | Will / Capcom / Surgeon | TV Show |
