Michael Connelly
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Setiap karakter ini telah muncul di setidaknya dua novel Connelly.
Lieutenant Grace "Bullets" Billets – Harvey Pounds' successor as Bosch's supervisor in Hollywood Homicide squad. When first introduced, she had a husband, but was in a same-sex relationship with Kiz Rider.
Madeline "Maddie" Bosch – daughter of Bosch and Eleanor Wish; Mickey Haller's niece.
Joel Bremmer - Keisha Russell's predecessor on the LA Times crime beat. In The Concrete Blonde, it is established that Bremmer wrote a novel about a string of murders committed by a serial killer known as "The Dollmaker." Bremmer used this pattern as a cover to commit several murders of his own.
Earl Briggs – Haller's regular driver until The Gods of Guilt, when he is killed in a car crash.
Elizabeth Clayton – a drug addict who helps Bosch in Two Kinds of Truth; in return he tries to help find the murderer of Elizabeth's daughter Daisy. Elizabeth commits suicide in Dark Sacred Night.
John Chastain – former LAPD Internal Affairs detective, killed during the events of Angels Flight.
David Chu – Bosch's partner in RHD Special Homicide. Was with LAPD's Asian Gangs Unit (AGU) during the events of 9 Dragons.
Teresa Corazon – Bosch's love interest in The Black Ice, appears later in City of Bones and A Darkness More than Night; medical expert examiner.
Jerry "Jed" Edgar (aka J. Edgar) – Bosch's former partner in Hollywood Homicide squad; appears in Two Kinds of Truth as a member of the Medical Board of California.
Ignacio "Iggy" Ferras – Bosch's former partner in the RHD Homicide Special Unit, killed during the events of 9 Dragons.
Hayley Haller – Daughter of Mickey Haller and Maggie McPherson; Harry Bosch's niece.
Aaron Hayes – A lifeguard at the beach Ballard often surfs or sleeps at. He has a casual sexual relationship with Ballard.
Carmen Hinojos – LAPD psychologist; first appears in The Last Coyote, Bosch later contacts her upon returning from Hong Kong to help Maddie cope with the events of 9 Dragons.
Irvin S. Irving – former LAPD Deputy Chief and Bosch's chief nemesis in the department, later an L.A. city councilman.
John Iverson - Las Vegas Metropolitan Police Detective in Trunk Music, appears later in Void Moon.
Thelma Kibble – Cassie Black's parole officer.
Howard Kurlen – detective in Van Nuys Division and frequent opponent of Haller's on the stand
Janis Langwiser – former prosecutor, now a criminal defense attorney.
Raul Levin – Mickey Haller's private investigator in The Lincoln Lawyer. Killed during the events.
Roy Lindell (aka "Luke Goshen") – FBI agent who first appears in Trunk Music.
Buddy Lockridge – McCaleb's friend and business associate.
Lola – Ballard's dog, a rescue, appears in every book Ballard appears in.
Bella Lourdes – Bosch's partner at the San Fernando Police Department; appears in The Wrong Side of Goodbye and assists Bosch and Ballard in Dark Sacred Night.
Oscar Luzon – A colleague of Bosch's at the San Fernando Police Department; appears in Two Kinds of Truth. In Dark Sacred Night Luzon is discovered to have tipped off gangster friends about an investigation, and attempts to commit suicide while being detained, resulting in Bosch's dismissal from the department.
Maggie "McFierce" McPherson – A prosecutor in the Van Nuys Division, Haller's first ex-wife.
Robert Olivas – Lieutenant of RHD in The Late Show who sexually harassed Ballard. Her complaint resulted in her transfer to the Late Show when no one backed her up. Has been promoted to Captain by the time of The Night Fire.
Lucius Porter – Hollywood Homicide Detective (The Black Echo and The Black Ice).
Harvey "Ninety-Eight" Pounds – Bosch's ex-supervisor in Hollywood Homicide squad, murdered in The Last Coyote.
Abel Pratt – LAPD Open-Unsolved Unit supervisor.
Kizmin "Kiz" Rider – Bosch's former partner in Hollywood Homicide squad and the RHD Open-Unsolved Unit; now an aide to the L.A. chief of police. When introduced, she was in a same-sex relationship with her commanding officer, Lt. Grace Billets.
Graciela Rivers-McCaleb.  Terry McCaleb meets Graciela and her nephew Raymond at the beginning of Blood Work.  In A Darkness More Than Night Terry and Graciela are married and living on Catalina Island, and they have a young daughter and have adopted Raymond.  In The Narrows she moves back to the mainland with the children.
Keisha Russell – Los Angeles Times reporter, started on the Los Angeles crime beat, Now based in D.C., and occasionally provided information for Bosch. Jack McEvoy's ex-wife.
Larry Sakai – Coroner technician with the LAPD.
Francis "Frankie" Sheehan – Bosch's original partner in Robbery-Homicide Division.
Lucia "Lucky" Soto – Bosch's partner in The Burning Room. Assists Ballard in Dark Sacred Night.
Lorna Taylor – Mickey Haller's current secretary and second ex-wife.
Ed Thomas – Hollywood Homicide Detective (mentioned in The Poet, appears later in The Narrows).
Steven Vascik – A process server in Angels Flight, based on a real-life acquaintance of the author. Vascik is credited with photos of Hong Kong on the author's website (photo gallery 15–17).
Jaye Winston – Detective with the Los Angeles County Sheriff's Department, works alongside both Bosch and McCaleb in Blood Work and A Darkness More Than Night.
Eleanor Wish – ex-FBI agent, ex-con and Bosch's ex-wife, mother of Bosch's daughter Maddie; moved to Hong Kong. Killed during the events of 9 Dragons.
Dennis "Cisco" Wojciechowski – Mickey Haller's private investigator. Formerly associated with the Road Saints motorcycle gang who bestowed him with the nickname Cisco in reference to The Cisco Kid. (Wojciechowski is named after Connelly's real-life investigator, who, like Bosch, is a Vietnam veteran.)