All 113 actors in both 9-1-1 and Station 19
113 actors have appeared in both 9-1-1 and Station 19, across 248 episodes. The most-credited is Tracie Thoms, Karen Wilson in 9-1-1 and Dr. Diane Lewis in Station 19.
| Actor | In 9-1-1 | In Station 19 | Eps | Eps |
|---|---|---|---|---|
| Tracie Thoms | Karen Wilson | Dr. Diane Lewis | 64 | 9 |
| Sterling Sulieman | Jonas | Grant | 1 | 9 |
| Chris Wu | Officer Williams | Employee #1 | 20 | 1 |
| Chelsea Harris | Amari Sharpe | Nikki | 1 | 3 |
| Tricia O'Kelley | Rita Ambrose | Kitty Dixon | 1 | 7 |
| Vanessa Marano | Sydney Grossman | Molly | 2 | 2 |
| Nina Millin | Yvette Sims, Esq. | Dayna Rutledge | 1 | 6 |
| Robert Curtis Brown | Ronald | Paul Montgomery | 1 | 8 |
| Rick Worthy | Colonel John Hartman | Anthony Hughes | 2 | 4 |
| Romy Rosemont | Lola Peterson | Jane | 5 | 1 |
| Mac Brandt | Eli Cobb | Agent Baxter | 3 | 1 |
| David Young Lee | Sang Han | Jae-Jin Park | 4 | 1 |
| Amber Friendly | Dr. Helen Green | Elaine | 3 | 1 |
| Elena Campbell-Martinez | Dr. Heller | Mrs. Ortega | 2 | 1 |
| George Wyner | Don | Morris Hapgood | 1 | 1 |
| Isidoro Pérez | Benny Wilkinson | Oliver | 1 | 1 |
| Jee Young Han | Liz | Charlotte Dearborn | 1 | 2 |
| Tom Wright | Buck's Doctor | Battalion Chief Gregory | 1 | 3 |
| Troy Winbush | Nathaniel Green | Clark | 3 | 1 |
| Matthew Wimbush | Firefighter #2 | Officer Gates | 1 | 3 |
| Phoebe Neidhardt | Lorna | Piper | 2 | 1 |
| Larry Poindexter | Maxwell Fulton | Chief McAllister | 1 | 3 |
| Tom Costello | Rick Evans | Gregory | 1 | 1 |
| Faline England | Donna | Janet | 2 | 1 |
| Chloe Lanier | Deena | Clara | 1 | 1 |
| Christie Lynn Smith | Candice Baker | Aston's Mom | 1 | 1 |
| Jonathan Del Arco | Craig | Steve | 1 | 1 |
| Keli Daniels | Marie | Principal Linsley | 1 | 1 |
| Lou Beatty, Jr. | Reggie Franklin Sr. | Stu | 1 | 1 |
| Tara Karsian | Ruth | Phyllis Myers | 2 | 1 |
| Ethan Corn | 2nd AD Mark | Firefighter Jeremy Heffington | 1 | 2 |
| Josh Archer | Patrol Cop | Police Officer 2 | 1 | 2 |
| Anne Gee Byrd | Fiona | Neighbor | 1 | 1 |
| Ellen Wroe | Ann Nash | Officer Elle Kingsley | 1 | 1 |
| Jonathan Silverman | Walter Schaffer | Ted | 1 | 1 |
| Michael Dempsey | Officer Dowers | Captain Josh Mesnik | 1 | 1 |
| Ramón de Ocampo | Wyatt Hawkerson | Jaime | 1 | 1 |
| Tangie Ambrose | Lottery Ticket Woman | Mrs. Monroe | 1 | 1 |
| Zachary Conneen | Bruce | Rick | 1 | 1 |
| Erica Shaffer | Mrs. Gallagher | News Anchor, News Weather Person | 1 | 2 |
| Alyshia Ochse | Park Mother | Leigh | 1 | 1 |
| Ann Hu | Joanie | Lisa | 1 | 1 |
| Annie Tedesco | Emma Coughlin | Carla | 1 | 1 |
| Azita Ghanizada | Kelly Wesson | Ms. Reed | 1 | 1 |
| Carlos Sanz | Det. Anderson | Julio | 1 | 1 |
| Drew Powell | David Cohen | Fowler | 1 | 1 |
| Eric Allan Kramer | Kendall's Dad | Randall | 1 | 1 |
| Farah Merani | Server | Sonia | 1 | 1 |
| James Eckhouse | Abe | Mr. Sorensen | 1 | 1 |
| Jenny O'Hara | Nora Curtis | Judith | 1 | 1 |
| John Eddins | Charlie Yates | Station 23 | 1 | 1 |
| Matthew Jain | Paramedic | Captain 42 | 1 | 1 |
| Matthew Jones | Zoo Sharp Shooter | Proctor | 1 | 1 |
| Sal Viscuso | Anton | Mr. Phillips | 1 | 1 |
| Tina Ivlev | Marylou | Libby | 1 | 1 |
| Zach Tinker | Officer Matthew Sparks | Greg | 1 | 1 |
| Brian Tichnell | Max Green | Trevor | 2 | 1 |
| Briella Guiza | Teen Amber Braeburn | Erica Garcia | 1 | 1 |
| Joely Fisher | Moira's Sister | Denise | 1 | 1 |
| Lucas Armendariz | Boy | Max | 1 | 1 |
| Sophina Brown | Candace Creedy | Joyce | 1 | 1 |
| Steve Wilcox | Roy | Taylor | 1 | 1 |
| Steven Culp | Henry Wallace | Detective Berarducci | 1 | 1 |
| Gabriel Rissa | District Attorney Paul | EMT, Medic #1 | 1 | 2 |
| DeJean Brown | Engineer | ER Nurse | 1 | 1 |
| Jamie Denbo | Producer | Grace Beckett | 1 | 1 |
| Jon Curry | Frederick Vaughn | Reese | 1 | 1 |
| Julie Ouellette | Elf Helper | Waitress | 1 | 1 |
| Paulina Alvarez | Kiley | Nanette | 1 | 1 |
| Ryan Dorsey | Ethan Copeland | Eddie | 1 | 1 |
| Shane Blades | Tom | Chef Dominic | 1 | 1 |
| Wilky Lau | Mr. Lozzano | Henry Lau | 1 | 1 |
| Al Carabello | Diego | Greg | 1 | 1 |
| Anthony Jordan Robertson | Jake | Morgan | 1 | 1 |
| Cullen Douglas | Harv | Erroll | 1 | 1 |
| Emanuel Borria | Hugo Castillo | William | 1 | 1 |
| Helen Madelyn Kim | Celeste Davis | Brenda | 1 | 1 |
| Wyndoline Landry | Fay | Caitlin | 1 | 1 |
| Brianna Reed | Teen Joanne | Davila | 1 | 1 |
| Calvin Peters | Young Dennis Jenkins | Factory Worker #1 | 1 | 1 |
| Daisy Washington | Daughter | Naomi | 1 | 1 |
| Jeremy Cohenour | Paulie | Shawn | 1 | 1 |
| Nanrisa Lee | Ticket Agent | Eleanor | 1 | 1 |
| Nikea Gamby-Turner | Doctor | Concerned Woman | 1 | 1 |
| Kyle Louis | Helicopter Pilot | Orderly | 2 | 1 |
| Alek Cole | Teenage Boy | Xander | 1 | 1 |
| Cary Christopher | Hayden Benson | Towheaded Boy | 1 | 1 |
| Kenajuan Bentley | Ibrahim | Tony | 1 | 1 |
| Keylor Leigh | Nurse | Rachel Del Rio | 1 | 1 |
| Shari Belafonte | Shirley | Gertrude Rose | 1 | 1 |
| Antonio Roccucci | DWP Trainee | Brad | 1 | 1 |
| Juliet Cassidy | Amber | Ariana | 1 | 1 |
| Kelly Lamarr | Irate Male Passenger | Jeff | 1 | 1 |
| Kimberly Christian | Juanita | Natalie Forrester | 1 | 1 |
| Steve Bannos | Boyd | Officer Garza | 1 | 1 |
| Debbie Fan | General Manager | Meeting Leader | 1 | 1 |
| Michael Shen | Man | Charlie | 1 | 1 |
| Anton Narinskiy | Caleb | Scott | 1 | 1 |
| Brandon Brown | Todd Browne | Tamil | 1 | 1 |
| Christopher Poehls | Young Thomas | Parent | 1 | 1 |
| Danny Brown | Frida | Stella | 1 | 1 |
| Earnestine Phillips | Woman | Diane | 1 | 1 |
| Jennifer Shelton | Ramona | Reporter | 1 | 1 |
| Jim Hanna | St. Patrick | Steve | 1 | 1 |
| Rodney Gardiner | TBD | Waiter | 1 | 1 |
| Sarah Cortez | Delilah | Ivy | 1 | 1 |
| Brandon Sutton | Brendan Tyler | USAR Captain | 1 | 1 |
| Ozy Reigns | Hubert | Prison Guard One | 1 | 1 |
| Ronald Auguste | Seth | Gavin | 1 | 1 |
| Steven Allerick | USAR Firefighter | Marco | 1 | 1 |
| Rajni Kareer | Trauma Surgeon | Chairwoman | 1 | 1 |
| Bodhi del Rosario | Emiliano Castillo | Cal | 1 | 1 |
| Joaquin Veizaga | Armando Perez | Steven Garcia | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.