
| Spencer Tracy | ... | Mayor Frank Skeffington |
 | Jeffrey Hunter | ... | Adam Caulfield |
 | Dianne Foster | ... | Mave Caulfield |
 | Pat O'Brien | ... | John Gorman |
 | Basil Rathbone | ... | Norman Cass, Sr. |
 | Donald Crisp | ... | Cardinal Martin Burke |
 | James Gleason | ... | 'Cuke' Gillen |
 | Edward Brophy | ... | 'Ditto' Boland |
 | John Carradine | ... | Amos Force |
 | Willis Bouchey | ... | Roger Sugrue |
 | Basil Ruysdael | ... | Bishop Gardner |
 | Ricardo Cortez | ... | Sam Weinberg |
 | Wallace Ford | ... | Charles J. Hennessey |
 | Frank McHugh | ... | Festus Garvey |
 | Carleton Young | ... | Winslow |
 | Frank Albertson | ... | Jack Mangan |
 | Bob Sweeney | ... | Johnny Degnan |
 | William Leslie | ... | Dan Herlihy |
 | Anna Lee | ... | Gert Minihan |
 | Ken Curtis | ... | Monsignor Killian |
 | Jane Darwell | ... | Delia Boylan |
 | O.Z. Whitehead | ... | Norman Cass Jr. |
 | Arthur Walsh | ... | Frank Skeffington Jr. |
| rest of cast listed alphabetically: |
 | Phil Adams | ... | Bit Role (uncredited) |
 | Alex Akimoff | ... | Bit Role (uncredited) |
 | Fred Aldrich | ... | Campaign HQ Extra (uncredited) |
 | Richard Alexander | ... | Mourner given cigar at Wake (uncredited) |
 | Frank Baker | ... | Banker Member of Plymouth Club (uncredited) |
 | Bobette Bentley | ... | First Blonde (uncredited) |
 | Steve Benton | ... | Bit Role (uncredited) |
 | Gail Bonney | ... | Woman, scene 190 (uncredited) |
 | Danny Borzage | ... | Pete (uncredited) |
 | Rand Brooks | ... | Votes Tallyman (uncredited) |
 | John Bryant | ... | Man at Campaign HQ (uncredited) |
 | Jack Chefe | ... | Crowd Extra (uncredited) |
 | Dick Cherney | ... | Bit Role (uncredited) |
 | Charles Cirillo | ... | Bit Role (uncredited) |
 | Richard Dale Clark | ... | Bit Role (uncredited) |
 | Ruth Clifford | ... | Nurse (uncredited) |
 | Edmund Cobb | ... | Man, scene 139 (uncredited) |
 | Bud Cokes | ... | Bit Role (uncredited) |
 | Hal K. Dawson | ... | Managing Editor (uncredited) |
 | Richard Deacon | ... | Graves, Club Secretary (uncredited) |

| John Deauville | ... | Bit Role (uncredited) |
 | George DeNormand | ... | Banker (uncredited) |
 | Joe Devlin | ... | Man, scene 54 (uncredited) |
 | James Dime | ... | Campaign HQ Extra (uncredited) |
 | Clint Dorrington | ... | Bit Role (uncredited) |
 | Mimi Doyle | ... | Mamie Burns (uncredited) |
 | Tommy Earwood | ... | Gregory McClusky (uncredited) |
 | Eddie Fetherston | ... | Bit Role, scene 36 (uncredited) |
 | Charles B. Fitzsimons | ... | Kevin McCluskey (uncredited) |
 | James Flavin | ... | Police Capt. Michael J. Shanahan (uncredited) |
 | George Ford | ... | Bit Role (uncredited) |
 | William Forrest | ... | Doctor Tom (uncredited) |
 | Joseph Forte | ... | Managing Editor, scene 36 (uncredited) |
 | Raoul Freeman | ... | Banker Member of Plymouth Club (uncredited) |
 | Sam Harris | ... | Member of Plymouth Club on stairway (uncredited) |
 | Ray Henderson | ... | Bit Role, scene 36 (uncredited) |
 | William Henry | ... | Votes Tallyman (uncredited) |

| Chuck Hicks | ... | Fighter (uncredited) |
 | Stuart Holmes | ... | Bit Role (uncredited) |
 | Chuck Howard | ... | Bit Role (uncredited) |
 | William Hudson | ... | Votes Tallyman (uncredited) |
 | Charles Anthony Hughes | ... | Man, scene 139 (uncredited) |
 | Thomas E. Jackson | ... | Man, scene 54 (uncredited) |
 | William Janssen | ... | Bit Role (uncredited) |
 | Mike Jeffers | ... | Bit Role (uncredited) |
 | Roy Jenson | ... | Fighter (uncredited) |
 | Roland Jones | ... | Bit Role (uncredited) |
 | Richard Keene | ... | Man, scene 139 (uncredited) |
 | Fred Kennedy | ... | Bit Role (uncredited) |
 | June Kirby | ... | Second Blonde (uncredited) |
 | Webster Lagrange | ... | Bit Role (uncredited) |
 | Harry Lauter | ... | Votes Tallyman (uncredited) |
 | Johnny Leone | ... | Bit Role (uncredited) |
 | Robert Levin | ... | Jules Kowalsky (uncredited) |
 | Edmund Lowe | ... | Johnny Byrne (uncredited) |
 | Wilbur Mack | ... | Banquet guest (uncredited) |
 | Hank Mann | ... | Bit Role (uncredited) |
 | Eve March | ... | Neighbor Woman, scene 54 (uncredited) |
 | Frank Marlowe | ... | Bit Role, scene 36 (uncredited) |

| Mae Marsh | ... | Mourner at Wake (uncredited) |
 | Philo McCullough | ... | Politician (uncredited) |
 | Joe McGuinn | ... | 2nd Man, scene 188 (uncredited) |
 | Edward McNally | ... | Ward Heeler (uncredited) |
 | Paul McVey | ... | Banker (uncredited) |
 | Harold Miller | ... | Banquet guest (uncredited) |
 | Jimmy Murphy | ... | Office Boy (uncredited) |
 | Forbes Murray | ... | Banker Member of Plymouth Club (uncredited) |
 | Tom Neal | ... | Tom - Mourner at Wake (uncredited) |
 | Bill Neff | ... | Man at Campaign HQ (uncredited) |
 | William H. O'Brien | ... | Bit Role (uncredited) |
 | Brian O'Hara | ... | Man, scene 61 (uncredited) |
 | Joe Palma | ... | Cop at Campaign HQ (uncredited) |
 | Emma Palmese | ... | Bit Role (uncredited) |
 | Harvey Parry | ... | Bit Role (uncredited) |
 | Jack Pennick | ... | Police Sgt. Rafferty (uncredited) |
 | Bob Perry | ... | Bit Role (uncredited) |
 | Clete Roberts | ... | News Reporter (uncredited) |
 | Molly Roden | ... | Neighbor Woman (uncredited) |
 | Victor Romito | ... | Bit Role (uncredited) |
 | Buck Russell | ... | Bit Role (uncredited) |
 | Dick Ryan | ... | Man, scene 139 (uncredited) |
 | Cosmo Sardo | ... | Bit Role (uncredited) |
 | Frank J. Scannell | ... | Man, scene 63 (uncredited) |
 | Jordan Shelley | ... | Bit Role (uncredited) |
 | Charles Sherlock | ... | Rally Marcher (uncredited) |
 | Stephen Soldi | ... | Bit Role (uncredited) |
 | George Spaulding | ... | Man, scene 54 (uncredited) |
 | Ted Stanhope | ... | 1st Man, scene 188 (uncredited) |
 | Anna Stein | ... | Bit Role (uncredited) |
 | Bert Stevens | ... | Political Rally Marcher / Man at Political HQ (uncredited) |
 | Harry Strang | ... | Harry - Mourner at Wake (uncredited) |
 | Brick Sullivan | ... | Ward Heeler (uncredited) |
 | Charles Sullivan | ... | Charlie - the Chauffeur (uncredited) |
 | Frank Sully | ... | Fire Lieutenant (uncredited) |
 | Julius Tannen | ... | Mr. Kowalsky (uncredited) |
 | Harry Tenbrook | ... | Caterer at Wake (uncredited) |
 | Charles Trowbridge | ... | Member of Plymouth Club at front door (uncredited) |
 | Phil Tully | ... | Man, scene 63 (uncredited) |
 | Harry Tyler | ... | Robert, Elderly Retainer (uncredited) |
 | Ruth Warren | ... | Ellen Davin (uncredited) |
 | James Waters | ... | Young Politician (uncredited) |
 | Helen Westcott | ... | Mrs. McCluskey (uncredited) |