







Xếp hạng theo doanh thu phòng vé Việt Nam (Box Office Vietnam).
| 2026 | TOVAH | Self |
| 2024 | Nhân Loại Sống Còn | Charles York |
| 2022 | The Day the Music Died: The Story of Don McLean's "American Pie" | Self |
| 2021 | Zoey's Extraordinary Christmas | Mitch Clarke |
| One December Night | Mike | |
| 2020 | One Night Only: The Best of Broadway | Self |
| Mở Mắt Thấy Hôm Qua | Howard | |
| 2019 | Cuộc Gặp Định Mệnh | Ken Scott |
| Stepdaddy | — | |
| 2018 | Something in the Air: Making "sex, lies, and videotape" | Self |
| Submission | Len | |
| 2017 | Những Bà Mẹ "Ngoan": Giáng Sinh | Hank Mitchell |
| Literally, Right Before Aaron | Orson Schwartzman | |
| 2016 | Center Stage: On Pointe | Jonathan Reeves |
| Cruel Intentions | Edward Valmont | |
| 2015 | Hello, My Name Is Doris | Willy Williams |
| In a Relationship | The Interviewer (voice) | |
| DeTour | Professor Zaring | |
| 2012 | Vũ Điệu Đường Phố 4 | Bill Anderson |
| Someday This Pain Will Be Useful to You | Paul Sveck | |
| 2010 | Vũ Nữ | Vince Scali |
| Conviction | Barry Scheck | |
| GasHole | Narrator (voice) | |
| 2009 | Adam | Marty Buchwald |
| The War Boys | Slater | |
| 2008 | Center Stage: Turn It Up | Jonathan Reeves |
| 2004 | Broadway's Lost Treasures II | Sky Masterson (segment "Guys & Dolls") |
| 2003 | Comedy Central Roast of Denis Leary | Self |
| The Adventures of Tom Thumb and Thumbelina | The Mole King (voice) | |
| How to Deal | Len Martin | |
| A Tale of Two Wives | Bill Goodman | |
| 2002 | Magic Time: A Tribute to Jack Lemmon | Self |
| Page to Screen: 'The Silence of the Lambs' | Host | |
| Ngài Deeds | Chuck Cedar | |
| 2001 | Feast of All Saints | Philippe Ferronaire |
| Protection | Ted | |
| Perfume | Guido | |
| My Favorite Broadway: The Love Songs | Self | |
| 2000 | The Last Debate | Tom Chapman |
| American Beauty: Look Closer... | Self | |
| Jesus Christ Superstar | First Priest | |
| Center Stage | Jonathan Reeves | |
| Cupid & Cate | Harry | |
| Other Voices | Jordin | |
| 1999 | Brotherhood of Murder | Bob Matthews |
| House on Haunted Hill | Donald W. Blackburn, M.D. | |
| Vẻ Đẹp Mỹ | Buddy Kane | |
| 1998 | Brave New World | Bernard Marx |
| Virtual Obsession | Dr. Joe Messenger | |
| Johnny Skidmarks | Johnny Scardino | |
| 1997 | The Man Who Knew Too Little | James Ritchie |
| Cafe Society | Jack Kale | |
| Path to Paradise: The Untold Story of the World Trade Center Bombing | John Anticev | |
| The Trial of Adolf Eichmann | Gideon Hausner (voice) | |
| 1996 | To Gillian on Her 37th Birthday | David Lewis |
| Cannes Man | Self | |
| Last Dance | John Hayes | |
| The Great Irish Famine | narrator | |
| 1995 | The Underneath | Michael Chambers |
| Khi Anh Hôn Mê | Peter Callaghan | |
| 1994 | Everybody Just Stay Calm | Self |
| Mrs. Parker and the Vicious Circle | Alan Campbell | |
| White Mile | Jack Robbins | |
| The Hudsucker Proxy | Vic Tenetta | |
| 1993 | Short Cuts | Stormy Weathers |
| Mother's Boys | Robert Madigan | |
| Malice | Atty. Dennis Riley | |
| Watch It | John | |
| Luck, Trust & Ketchup: Robert Altman in Carver Country | Self | |
| 1992 | Guys and Dolls: Off the Record | Himself / Sky Masterson |
| Bob Roberts | Dan Riley | |
| Buying a Landslide | Philip Kautsky | |
| The Player | Larry Levy | |
| Robert Altman's Players | Self | |
| 1991 | The Cabinet of Dr. Ramirez | Matt |
| Late for Dinner | Bob Freeman | |
| Milena | Pollak | |
| 1990 | Tune in Tomorrow... | Richard Quince |
| Love and Lies | David West | |
| 1989 | Tình Dục, Dối Trá Và Băng Video | John Mullany |
| 1988 | I'll Be Home for Christmas | Aaron Copler |
| High Spirits | Brother Tony | |
| The Caine Mutiny Court-Martial | Lt. Cmdr. John Challee | |
| 1987 | Long Day's Journey Into Night | Edmund Tyrone |
| 1986 | My Little Girl | Kai |
| 1985 | Dreamchild | Jack Dolan |
| 1984 | Terrible Joe Moran | Nick |
| 1982 | Summer Lovers | Michael Pappas |
| 1980 | The Idolmaker | Caesare |
| Skag | John Skagska |
| 1991 | The Cabinet of Dr. Ramirez | Story |
Theo dữ liệu phòng vé Việt Nam (Box Office Vietnam), Peter Gallagher có 1 phim với tổng doanh thu 2.41 tỷ.
Phim doanh thu cao nhất là "Mở Mắt Thấy Hôm Qua" (2021) với 2.41 tỷ tại phòng vé Việt Nam.
Peter Gallagher là diễn viên, sinh tại New York City, New York, USA.