Cabot, Wentworth: Mark Twain's secretary in the United States by Peter J. Heck

Cadfael, Brother: medieval monk, & herbalist in Shrewsbury, England by Ellis Peters

Caffery, Jack: a troubled police detective in London, England by Mo Hayder

Caine, John: Navy SEAL turned private eye in Pearl Harbor, Hawaii by Charles Knief

Callahan, Timothy: a legislative aide for a New York state senator, in Albany, New York by Richard Stevenson

Caldecote, Sergeant Denise "Denni": in Marston, England by Christine Green

Calder, Keith: gunsmith in Newton Lauder, Scotland by Gerald Hammond

Caleb, Jack: a gay psychiatrist in Chicago, Illinois by Michael Allen Dymmoch

Caliban, Cat: 60-something P.I.-in-training in Cincinnati, Ohio by D. B. Borton

Callahan, James: homicide detective in Boston, Massachusetts by Al Blanchard

Callahan, Mick: a radio talk show psychologist in Dry Wells, Nevada by Harry Shannon

Callaghan, Slim: a tough private investigator in England by Peter Cheyney

Callahan, Sister Rose: eldress of the community of believers at the Shaker village of North Homage, Kentucky by Deborah Woodworth

Calvino, Vincent ("Vinee"): a private investigator and ex-New Yorker in Southeast Asia by Christopher G. Moore

Camden, Claire: a California English professor in London, England by Audrey Peterson

Cameron, Sandra: a detective in Los Angeles, California by Michael Joens

Campbell, Liam: Alaskan State Trouper in Newenham, Alaska by Dana Stabenow

Campion, Albert: suave sleuth with noble blood in London, England by Margery Allingham

Canaletto: an 18th century Italian painter in London, England by Janet Laurence

Canfield, Caroline: a wildlife artist in River Ridge, Illinois by Jacqueline Fiedler

Candiotti, Jane: a homicide inspector in San Francisco, California by Clyde Phillips

Capricorn, Merle: a former vaudeville magician turned police superintendent in England by Pauline Glen Winslow

Cardenas, Sixto: a Puerto Rican cop, in Puerto Rico by M. J. Adamson

Cardenas, Victor: a police detective in Atlantic City, New Jersey by Jane Rubino

Cardigan, Jack: a 22nd century ex-cop private investigator in Los Angeles, California by William Shatner

Cardinal, John: a homicide detective near Algonquin Bay, Ontario, Canada by Giles Blunt

Carey, Neal: youthful pickpocket turned P.I. in New York, New York by Don Winslow

Carey, Sir Robert: an Elizabethan nobleman in England by P. R. Chisholm

Carl, Victor: a down-on-his-luck, money-hungry Philadelphia lawyer by William Lashner

Carlin, Carrie: biofeedback specialist in New Jersey by Nancy Tesler

Carlson, Robin: an American martial-arts instructor in Amsterdam, The Netherlands by Sue Rann

Carlyle, Carlotta: a cab-driving ex-cop PI in Boston, Massachusetts by Linda Barnes

Carmichael, Agnes: a hospital staff nurse in England by Anthea Cohen

Carmichael, Caroline: CIA analyst by Francine Mathews

Carolina, Michael: former TV investigative reporter in Providence, Rhode Island by Thomas Gately Briody

Carpenter, Andy: an attorney in Paterson, New Jersey by David Rosenfelt

Carpenter, Kate: a front of the house manager in the Foothill Stage Network in Calgary, Alberta, Canada by Deborah Nicholson

Carpenter, Scott: a baseball player in Chicago, Illinois by Mark Richard Zubro

Carrick, Webb: chief officer of the Scottish Fishery Protection Service in Scotland by Bill Knox

Carruthers, Simpson and Biggs , three elderly down- on- their- luck mystery writers, putting their plots into action in The Murder League Trilogy by Robert L. Fish

Carter, Jack: 1940s captain in Ireland by Jack Higgins

Carter, Neil: Scotland Yard detective in London, England by Eileen Dewhurst

Carter, Nick: (in an updated persona) a sexually active, gun slinging secret agent by Nick Carter

Cartier, Anne: an ex-vaudeville actress then a tutor for deaf children, in England and France on the eve of the French Revolution by Charles O'Brien

Cartwright, Captain Harry: a wounded, bitter survivor of the Boer War, now a "fixer" in Edwardian England by Marion Chesney

Caruso, Enrico: Italian tenor in New York, New York by Barbara Paul

Carvalho, Pepe: a gourmet private investigator in Barcelona, Spain by Manuel Vazquez Montalban

Carver, Dane: an FBI special agent by Catherine Coulter

Carver, Fred: private investigator in Del Moray, Florida by John Lutz

Casella, Tony: a family-man private investigator in New York, New York by Larry Beinhart

Casey, Samantha (Sam): is a Native American who can hear the dead speak and  a detective sergeant in Chasen Heights, Illinois by Sandra Tooley

Casey, Tom: a private investigator in Medford, Oregon, in the Hawkman mysteries by Betty Sullivan La Pierre

Casey, DCI Will (Willow Tree) and DS Thomas Catt are assigned to the police station in King's Langley, England by Geraldine Evans

Cassidy, Brooke: mystery writer in 1890s Newport, Rhode Island by Mary Kruger

Cassidy, Faith: an actress-turned-therapist by Catherine Dain

Castang, Henri: police detective in Brussels, Belgium by Nicolas Freeling

Cat, Joe Grey: private investigator by Shirley Rousseu Murphy

Cates, Mollie: true crime writer and reporter, in Texas by Mary Willis Walker

Catt, DS Thomas and DCI Will (Willow Tree) Casey and are assigned to the police station in King's Langley, England by Geraldine Evans

Caulfield, Am: a hotel detective in San Diego, California by Alan Russell

Caution, Lemmy: an FBI agent in America by Peter Cheyney

Cavanaugh, Kate: a gourmet caterer in Cincinnati, Ohio by Cathie John

Cavanaugh, Nick: Navy vet and Fleet Boxing Champ in 1940s Newport, Kentucky by Cathie John

Cellini, Dr. Emmanuel: psychiatrist in London, England by John Creasey

Cervantes, Antonio "Chico": a private eye in Los Angeles, California by Bruce Alexander

Chainey, Martha:   a courier for the corporate mob in Las Vegas, Nevada by Gary Phillips

Chaisson, Danny: a former Assistant District Attorney, now a bagman for crocked state senator in New Orleans, Louisiana by Kenneth Abel

Challis, Bart: a hard-boiled private investigator in Los Angeles, California by William F. Nolan

Challis, Hal: a Detective Inspector on the Peninsula south-east of Melbourne, Australia by Garry Disher

Chamberlain, Lindsay: forensic archeologist in Georgia by Beverly Connor

Chambrun, Pierre: the resident manager of the Hotel Beaumont in New York, New York by Hugh Pentecost 

Chan, Charlie: detective in Honolulu, Hawaii by Earl Derr Biggers

Chandler, Zinc: a member of the Special X department of the Royal Canadian Mounted Police in Vancouver, British Columbia, Canada by Michael Slade

Chapel, Ian: one-eyed pro soccer goalie turned private investigator in Los Angeles, California by Paul Bishop

Charles, Edwina: a clairvoyant in England by Mignon Warner

Charters, Emily: an adopted grandmother by Fred Hunter

Chase, Alden: a chief of police  in Wading River, Massachusetts by Theodora Wender

Chase, Dr. Elizabeth: Stanford-trained parapsychologist turned P.I. in San Diego, California by Martha C. Lawrence

Chase, Nikki: a black economics professor in Cambridge Massachusetts in the Ivy League Mystery series by Pamela Thomas-Graham

Chastain, Laura: an assistant district attorney in Atlanta, Georgia by Lelia Kelly

Chavasse, Paul: a globe-trotting spy for Britain in the 1960's by Jack Higgins, written as Martin Fallon

Chee, Jim: Navajo tribal police officer in the Southwest by Tony Hillerman

Childs, Sunny: private investigator with Peachtree Investigations in Atlanta, Georgia by Ruth Birmingham

Chin, Lydia: 30-something Chinese-American PI in New York by S. J. Rozan

Chinaman, Sassafras Winter's valet in Harlem, New York by Steven Philip Jones

Chirke, Nicholas: young medieval lawyer in England by P. C. Doherty

Chizzit, Emma: a salvage dealer in Sacramento, California by Mary Bowen Hall

Choice, Allen: a Korean-American Silicon Valley investigator in Los Angeles, California by Leonard Chang

Christopher, Robert: television reporter in Los Angeles, California by Robert Irvine

Christy, Gordon: a veterinarian and Gala in New Mexico by Barbara Moore

Ciampi, Marlene: 1970s Criminal Courts Bureau chief New York, New York by Robert K. Tanenbaum

Claiborne, Clair: a beauty salon owner in New Orleans, Louisiana by Sophie Dunbar

Clancy, Jack: a reporter in Portland Oregon by K. K. Beck

Clark, Megan: a reference librarian and a member of the murder mystery reading group, Murder by the Yard, in Amarillo, Texas by D.R. Meredith

Cleever, Denise: an agent for the Australian Security Intelligence Organization in Australia by Claire McNab

Clement, Jules: an archaeologist turned sheriff in Blue Deer, Montana by Jamie Harrison

Clemons, Frank: a  homicide detective in Atlanta, Georgia; later a private eye in New York, New York by Thomas H. Cook

Clevenger, Frank: a forensic psychiatrist in Massachusetts by Keith Ablow

Cline, Steve: a young stable hand in Maryland by Kit Ehrman

Cobb, Matt: network television executive in New York, New York by William L. DeAndrea

Cockrill, Inspector, a constable in Kent County, England by Christianna Brand

Coffin, Inspector John: police inspector in London, England by Gwendoline Butler

Cohen, Avram: a police officer in Jerusalem, Israel by Robert Rosenberg

Cohen, Midge: a children's author fluent in Russian in Brooklyn, New York by Toni Brill

Colbeck, Robert: a former attorney now serving as an inspector in the fledging Scotland Yard in 1851 London, England by Edward Marston

Cole, Elvis: one of a pair of Hollywood private eyes in Los Angeles, California by Robert Crais

Cole, Larry: a police commander in Chicago, Illinois by Hugh Holton

Cole, Lewis: Department of Defense, retired in Tyler Beach, New Hampshire by Brendan DuBois

Coll, Matthew: antiquarian bookseller in Dorset, England by Roy H. Lewis

Collins, Hap: straight and white in east Texas by Joe R. Lansdale

Collins, Henrietta O'Dwyer: 70-something reporter, in South Carolina by Carolyn G. Hart

Collins, Quinn: a reporter for the Hollywood Star, in Hollywood, California by Nancy Baker Jacobs 

Collins, Wilkie: a 19th century writer in London, England by  William J. Palmer

Colorado, Kat: bar-tending private investigator, in Sacramento, California by Karen Kijewski

Colt, Thatcher: police commissioner in New York, New York by Anthony Abbot

Comaday, John: police commissioner in New York by E. V. Cunningham

Cone, Timothy: Wall Street financial detective in New York, New York by Lawrence Sanders

Connor, Gail: corporate attorney in Miami, Florida by Barbara Parker

Connor, Lexy: Connor, a software consultant in Boulder, Colorado by Truly Donovan

Connor, Lily: an Episcopalian priest in Boston, Massachusetts by Michelle Blake

Connors, Maggie: a stock broker by Malinda Terreri

Connor, Petra: cop in Los Angeles, California by Jonathan Kellerman

Connors, Liz: former English professor and freelance crime writer in Cambridge, Massachusetts by Susan Kelly

Conte, Gerry, undercover cop turned defense attorney in New York, New York by Angela Amato & Joe Sharkey

Cook, Nancy: a Chaucer scholar & professor in Chicago, Illinois by D. J. H. Jones

Cooper, Alex: Assistant District Attorney in New York, New York by Linda Fairstein

Cooper, Detective Constable Ben:  trying to fill his police Sargeant father's shoes in England by Stephen Booth

Cooper, Den: a determined policeman in Devon, England by Rebecca Tope

Cooper, Eve: aspiring photographer and daughter of U.S. President Elliot Cooper in Washington D.C. by Susan Ford

Cooper, Iris: a flapper in Portland Oregon by K. K. Beck

Cooperman, Benny: private investigator in Grantham, Ontario, Canada by Howard Engel

Copp, Joe: a private investigator in Hollywood, California by Don Pendleton

Coran, Jessica: FBI medical examiner in Washington DC by Robert W. Walker

Corbett, Hugh: spy for King Edward I in England by P. C. Doherty

Cord, Talos: a United Nations troubleshooter in New York, New York by Robert MacLeod

Corinth, Lord Edward: a jaded English aristocrat between the wars in 1930s London, England by David Roberts

Corps Series: featuring World War II in the South Pacific by W. E. B. Griffin

Corso, Frank: a former New York Times journalist, now working at the third rate Seattle Sun, in Seattle, Washington by G. M. Ford

Corvinus, Marcus: a member of the Senatorial class in first century AD Rome by David Wishart

Cosi, Clair: the manager of the Village Blend, a long-established landmark coffeehouse in New York City's Greenwich Village by Cleo Coyle

Cosicki, Andrea “Andy”: who writes the Mr. Action consumer column. in Philadelphia, Pennsylvania by Bill Kent

Coventry, Bryson: a homicide detective in Denver, Colorado by Jim Michael Hansen

Covington, Grace “Candi” (Mama): an African-American county social worker in Otis, South Carolina by Nora Deloach

Covington, Simone: a paralegal in Atlanta, Georgia by Nora Deloach

Coyne, Brady: sports fisherman and lawyer in Boston, Massachusetts by William G. Tapply

Coyle, Danny: a gambler by Judson Philips

Crabtree, Tempe: the woman deputy of Bear Creek, California, torn between her Native American (Yanduchi) traditions and her loyalty to Hutch, her minister husband by Marilyn Meredith

Crader, Carl and Jazine, Earl: by Edward D. Hoch

Craig, Melissa: British crime novelist in the Cotswolds, England by Betty Rowlands

Craik, Alan: a young U. S. Navy Intelligence officer on assignments around the world by Gordon Kent

Crane, Bill: private detective in Chicago, Illinois by Jonathan Latimer

Crane, Mary Alice "Sister": country-western bar owner in Alabama by Anne George

Crane, Ruby: a handwriting analyst in her home town in Michigan by Jo Dereske

Crang, lawyer and jazz buff in Toronto, Canada by Jack Batten

Cranston, John: a coroner in London, England by Paul Harding

Crawford, Thea: an archaeology professor in England by Jessica Mann

Craven, Nick: of the Special X department of the Royal Canadian Mounted Police in Vancouver, British Columbia, Canada by Michael Slade

Crawley, Ray: Federal Security Agency director in Sydney, Australia by Peter Corris

Cribb, Richard: Victorian policeman in London, England by Peter Lovesey

Crichton, Tess: actress sleuth in England by Anne Morice

Crisp, Winston: a retired National Security code-breaker, in Penobscot Island, Maine, in the Maine Island Mysteries by David A. Crossman

Croaker, Fey: a 40-something homicide cop in Los Angeles, California by Paul Bishop

Croft, Joshua: wise-cracking PI in Santa Fe, New Mexico by Walter Satterthwait

Croft, Mike: detective inspector in Norfolk, England by Jane Adams

Crook, Arthur G.: a fat, beer-drinking Cockney barrister in London, England by Anthony Gilbert

Cross, Alex: psychiatrist and homicide cop in Washington D.C. by James Patterson

Crow, Joe: one of a group of small town gamblers in Minnesota by Peter Hautman

Crow, John: a British police inspector in England by Roy Lewis (b.1933)

Crow, Mary: a half Cherokee assistant district attorney in Atlanta, Georgia by Sallie Bissell

Crowder, George: an attorney by Hugh Pentecost

Crowder, Lauren: attorney in Boulder, Colorado by Stephen White

Crowne, Rachel: a free-lance journalist in Vermont by Ellen Rawlings

Crowner John: Sir John de Wolfe, the crowner (coroner), in 12th century Devon, England, by Bernard Knight

Cruz, Carlos: a homicide detective in Oakland, California by Marilyn Wallace

CSI: Crime scene investigators in Miami, Florida and Las Vegas, Nevada by Max Allan Collins

Cuddy, John Francis: Army police lieutenant turned PI in Boston, Massachusetts by Jeremiah Healy

Cunningham, John: a hunting dog breeder in Scotland by Gerald Hammond

Curry, Sandrine Cadette: a Girl Friday, works in a law firm in 1960s New York, New York by Michael Bowen

Curry, Thomas: an ex-lawyer works in a law firm in 1960s New York, New York by Michael Bowen