List of 9-1-1 characters

• Angela Bassett as Athena Carter Grant Nash, LAPD patrol sergeant, mother of May and Harry from her first marriage to Michael Grant. Athena and Michael divorce in the first season. At the end of season one she began dating Bobby Nash and at the end of the second season becomes Bobby's wife. Pepi Sonuga portrays a younger Athena during an episode of season 3[1]
• Peter Krause as Robert "Bobby" Nash, LAFD Station 118 captain and later Athena's husband. Before arriving at Los Angeles, Bobby lived in Minnesota where his wife and two kids died in a fire.
• Oliver Stark as Evan "Buck" Buckley, firefighter and Maddie's younger brother. Buck was a womanizer at first, but after meeting Abby he started looking for serious relationships.
• Aisha Hinds as Henrietta "Hen" Wilson, firefighter/paramedic. She is married to Karen and they have two children: Denny and Nia.
• Kenneth Choi as Howard "Howie"/"Chimney" Han, firefighter/paramedic and Maddie's partner. At the end of season three they find out Maddie is pregnant. He grew up in the Los Angeles area with his mother while his father returned to South Korea. As a result he has a very testy relationship with his father, especially after the elder Mr. Han openly expressed his disappointment in his chosen profession. He has a younger half-brother named Albert, who secretly left South Korea to escape their father's control and lived with him for a while.
• Rockmond Dunbar as Michael Grant, Athena's ex-husband. The two amicably divorce after he comes out as gay. He and Athena remain close friends and confidants, and the friendship extended to her new husband Bobby.
• Connie Britton as Abigail "Abby" Clark, 911 operator (season 1; special guest season 3).[2] Abby leaves at the end of season one to travel the world following her mother's passing. She never came back to Los Angeles until the season 3 finale to give Buck closure. She ended up engaged and living in Arizona.
• Jennifer Love Hewitt as Madeline "Maddie" Buckley Kendall,[3] 911 operator, Buck's sister, and Chimney's partner. Maddie was in an abusive marriage and ended up killing her husband Doug Kendall in self defence after he stabbed Chimney and kidnapped her. At the end of season three she finds out she is pregnant with her and Chimney's first child.(season 2 – present)[4]
• Ryan Guzman as Edmundo "Eddie" Diaz, firefighter. (season 2 – present)[5][6] He joined the 118 fresh out of the academy. A Texas native, he served in the United States Army as a combat medic and moved to Los Angeles after being discharged. He served in Afghanistan and his combat experience is shown through his ability to think quickly on his feet even under duress with minimal back-up. He is a single father and has a son named Christopher.
• Corinne Massiah as May Grant, Athena and Michael's daughter. Graduate high-school at the end of season three. Begins training as a 911 operator in season 4.(season 2; recurring season 1)[7]
• Marcanthonee Jon Reis as Harry Grant, Athena and Michael's son (season 2; recurring season 1)[7]
• Gavin McHugh as Christopher Diaz, Eddie's son (season 3; recurring season 2)[8]

This is a list of recurring actors and the characters they portrayed in multiple episodes, which were significant roles, sometimes across multiple seasons.

The following is a supplementary list of guest stars, some recurring, who appear in lesser roles.