Tommy Fabian: one of a group of small town gamblers in Minnesota, by Peter Hautman

Jean Fairbairn: working for an Edinburgh-based history and travel magazine, and Alasdair Cameron, a police detective, in Scotland, by Lillian Stewart Carl

Faith Fairchild: who marries a clergyman and leaves New York City for a small town in New England, by Katherine Hall Page

Charley Van Leeuwen Fairfax: heiress, and her new husband Jack, in San Francisco, California, by Margaret Dumas

Phoebe Fairfax: camera operator for “A Day in the Life Style” TV program in Calgary, Alberta, Canada, by Suzanne North

Melville Fairr: a lawyer in New York, by Michael Venning (Craig Rice)

Doran Fairweather: antiques seller, married to vicar Rodney Chelmarsh, in Kent, England, by Mollie Hardwick

Marcus Didius Falco: an “informer” for Emperor Vespasian in 1st century Rome, by Lindsey Davis

Javier Falcon: detective inspector in Spain, by Robert Wilson 

Samantha (Sam) Falconer: world judo champion turned private investigator at the Gentle Way investigation agency in London, working in Oxford, England, by Victoria Blake

William Falconer: 13th century university regent master in Oxford, England, by Ian Morson

Jesse Falkenstein: lawyer in Los Angeles, California, by Leslie Egan (Elizabeth Linington)

Harry Fannin: private detective in 1960s New York City, by David Markson

Kate Fansler: a university English professor in New York City, by Amanda Cross

Joe Faraday: detective inspector in Portsmouth, England, recently promoted to the elite Major Crimes Team, by Graham Hurley

Mike Faraday: hard-boiled private eye, in Los Angeles, California, by Basil Copper

Milton Farb, Oliver Stone, Caleb Shaw, and Reuben Rhodes: The Camel Club, a group of four dysfunctional men who investigate political conspiracies, and honorary member Alex Ford, a Secret Service agent, in Washington, DC, by David Baldacci

Inspector Jeremy Faro: detective in Victorian Edinburgh, Scotland, by Alanna Knight

Brodie Farrell: running a search service in Dimmock, England, by Jo Bannister

Mike Farrell: by Carter Brown

Wesley Farrell: Creole nightclub owner passing for white, in 1930s New Orleans, Louisiana, by Robert Skinner

Kay Farrow: color-blind photojournalist in San Francisco, California by David Hunt (William Bayer)

Johnny Fedora: secret agent and adventurer, based in England, by Desmond Cory

Harry Feiffer: chief inspector of Yellowthread Street station in Hong Kong, China by William Marshall

Dr. Gideon Fell: the “old lexicographer” in England, by John Dickson Carr

Fred Fellows: chief of police in a small town, Stockford, Connecticut, by Hillary Waugh

George, Bunty, and Dominic Felse: family of detectives in Comerford, Shropshire, England, by Ellis Peters

Cora Felton: crossword creator with a nationally-syndicated column in Bakerhaven, Connecticut, in the Puzzle Lady mysteries, by Parnell Hall

Gervase Fen: professor of English in Oxford, England, by Edmonds Crispin

John Fenchurch: Cambridge Fellow in England, by Dorsey Fiske

Martin Fender: skip tracer in Austin, Texas, by Jesse Sublett

Dr. Andrew Fenimore: family physician in Philadelphia, Pennsylvania, by Robin Hathaway

Dave Fenner: reporter turned private investigator, by James Hadley Chase

Andrew Fenwick: DCI in Sussex, England, by Elizabeth Corley

Jane Ferguson: ex-law student and assistant to Hillary Scarborough, a domestic artiste, in the Murder by Design series by Paula Carter

Clare Fergusson: newly-ordained Episcopal priest, and Russ Van Alystyne, Chief of Police, in Millers Kill, New York, by Julia Spencer-Fleming

Lewellyn Ferris: fly fishing wonder and the Chief of Police, in Loon Lake, Wisconsin, by Victoria Houston

Sister Fidelma: 7th century Celtic sister and legal advocate in Kildaire, Ireland, by Peter Tremayne

Jack Field: former NYPD detective, retired to run a kennel in Maine, by Lee Charles Kelley

Emma Fielding: archaeologist, by Dana Cameron

Kit Fielding: jockey in England, by Dick Francis

Sir John Fielding: blind magistrate and founder of the first police force in 1700s London, England, by Bruce Alexander

Suze Figueroa and Norm Bennis, a pair of cops in Chicago, Illinois, in the Chicago Police series by Barbara D’Amato

Elmo Finn: Vietnam Vet, retired from the CIA on Longboat Key in Sarasota, Florida, by Michael McClister

Maggie Fiore: magazine writer and editor in San Francisco, California, by Linda Lee Peterson

Nina Fischman: public service lawyer for the elderly in New York City, by Marissa Piesman

Paul Fischer: college professor in Oregon and Maine, by Tom Mitcheltree

Phryne Fisher: in 1920s Melbourne, Australia, by Kerry Greenwood

Hugo Fitzduane: photographer and current occupant of his family’s ancient Irish castle, by Victor O’Reilly

Colleen Fitzgerald: insurance investigator in Rehobeth Beach, Delaware, by Barbara Johnson

Fiona Fitzgerald: homicide detective in Washington DC, by Warren Adler

Fizz Fitzgerald: law student assistant to Tam Buchanan, lawyer, in Edinburgh, Scotland, by Joyce Holms

Grace Fitzgerald: Detective Chief Superintendent with the murder squad, and Saxon, a former US FBI agent turned true-crime writer, in Dublin, Ireland, by Ingrid Black

Conan Flagg: bookstore owner and former intelligence agent, in Oregon, by M.K. Wren

Jimmy Flannery: sewer inspector and Democratic precinct captain in Chicago, Illinois, by Robert Campbell

Dixie Flannigan: prosecutor turned bounty hunter in Houston, Texas, by Chris Rogers

Ian Fleming: journalist after a distinguished career as an intelligence operative during World War II in Jamaica, by Quinn Fawcett (Chelsea Quinn Yarbro)

Jack Fleming: 1930s reporter turned vampire in Chicago, Illinois, in the Vampire Files, by P.N. Elrod

James Fleming: solicitor in Dublin, Ireland, by Ann C. Fallon

Laura Fleming: a small-town Southern sleuth in Byerly, North Carolina, by Toni Kelner

Marjory Fleming: detective inspector, in Scotland, by Aline Templeton

Walt Fleming: sheriff in Sun Valley, Idaho, by Ridley Pearson

Irwin M. “Fletch” Fletcher: reporter turned beach bum socialite in the United States, by Gregory McDonald

Jay Fletcher: rogue FBI agent in the USA, by A.J. Holt

Jessica Fletcher, mystery writer in Cabot Cove, Maine, in the “Murder, She Wrote” series, by Donald Bain

Philip Fletcher: British thespian and killer in London, England, by Simon Shaw

Jack Flippo: private investigator in Dallas, Texas, by Doug J. Swanson

Kathy “Caz” Flood: detective constable in Brighton, England, by Alex Keegan

Ray Flowers: former police sergeant, now a private investigator in England, by Jane Adams

Virgil Flowers: thrice-divorced, affable member of the Minnesota Bureau of Criminal Apprehension (BCA), by John Sandford

CJ Floyd: black bail bondsman, later Western collectible dealer, in Denver, Colorado, by Robert Greer

Fiddler and Fiora Flynn: a knight-errant and an investment banker, in Crystal Cove, California, by A.E. Maxwell

Francis Xavier Flynn: tenacious police inspector in Boston, Massachusetts, by Gregory McDonald

Kelly Flynn: previously with a fear of needles, who is now learning to knit at the House of Lambspun, in Ft. Connor, Colorado, by Maggie Sefton

Laura Flynn: private investigator in London, England, by Lesley Grant-Adamson

Mickey Flynn: American photojournalist, by Jo Bannister

Terry Flynn and Karen Kovac, special squad detectives in Chicago, Illinois, by Bill Granger

Hannah Fogarty: opening a new bookstore in her old home town of Destiny, Texas, by Cindy Daniel

Luanne Fogarty: scuba diver in northern Florida swamp country near Tallahassee, Florida, by Glynn Marsh Alam

Eloise “Weezie” Foley: recently divorced antique dealer, and BeBe Loudermilk, a triple-divorced restaurant owner, in Savannah, Georgia, by Mary Kay Andrews (Kathy Hogan Trocheck)

Malachy P. Foley: jazz piano-playing private investigator in Chicago, by David J. Walker

Merry Folger: police officer on Nantucket Island, Massachusetts, by Francine Mathews

Lew Fonesca: down and out process server in Sarasota, Florida, by Stuart M. Kaminsky

Zhong Fong: head of the Special Investigation Unit, in Shanghai, China, by David Rotenberg

Danny Fontaine: by William Ard

Mac Fontana: ex-firefighter and arson investigator in Staircase, Washington, by Earl Emerson

Alex Ford: Secret Service agent, and The Camel Club, a group of four dysfunctional men who investigate political conspiracies (Oliver Stone, Milton Farb, Caleb Shaw, and Reuben Rhodes), in Washington, DC, by David Baldacci

Marion “Doc” Ford: ex-operative marine biologist in Sanibel Island, Florida, by Randy Wayne White

Noah Ford: military investigator for the Army in the post-Civil War US, in the Cavalry Man series, by Ed Gorman

Ellie Foreman: recently divorced suburban mom, who makes video documentaries, in Chicago, Illinois, by Libby Fischer Hellmann

Simon Forman: physician-astrologer in Elizabethan London, England, by Judith Cook

Lily Forrester: Assistant District Attorney in southern California, by Nancy Taylor Rosenberg

Molly Forrester: advice columnist in New York City, by Sheryl J. Anderson

Robert (Robby) Forsyth: retired barrister, and Abigail (Sandy) Sanderson, his crisply efficient secretary, in London, England, by E.X. Giroux

Margo Fortier: ex-stripper turned columnist in New Orleans, Louisiana, by Tony Fennelly

Trey Fortier: homicide detective, and Lane Montana, a finder of lost things, in Atlanta, Georgia, by Kay Hooper

Socrates Fortlow: philosophical ex-con in California, by Walter Mosley

Dan Fortune: one-armed Polish-Lithuanian private investigator in New York City, by Michael Collins

Sarah Fortune: lawyer in a prestigious firm in London England, by Frances Fyfield

Stick Foster: paraplegic newspaper reporter in Orlando, Florida, by Kevin Robinson

Charlotte “Charlie” Fox: self-defense expert based in England, by Zoë Sharp

(William) Tecumseh (Sherman) Fox: detective in New York, by Rex Stout

Superintendent Francis Foy by Lionel Black

L.A. “Frank” Franco: homicide detective in Los Angeles, California, by Baxter Clare

Lucas Frank: retired forensic psychiatrist, by John Philpin

Margo Franklin: waitress, and Philip Spence, an artist, in Chicago, Illinois, by Jerry B. Jenkins

Kit Franklyn: criminal psychologist, and Andy Broussard, a medical examiner, in New Orleans, Louisiana, by D.J. Donaldson

Tim Frazer: young engineer who gets involved in intrigue, by Francis Durbridge

Dr. Robert “Mongo” Frederickson: dwarf criminology professor and former circus gymnast in New York City, by George Chesbro

Benny Freedman: private investigator, in San Diego, California, by Milton Bass

Jub Freeman, Commander Bill Decker, and Mitch Taylor, police detectives in New York City, by Lawrence Treat

Max Freeman: cop from Philly who shot and killed a 12 year-old, quit, and moved to the edge of the Florida Everglades, by Jonathon King

Virginia Freer: physiotherapist, and Felix Freer, a thief, in London, England, by E.X. Ferrars

Joseph French: inspector at Scotland Yard, in London, England, by Freeman Wills Crofts

Dame Frevisse: medieval nun in Oxfordshire, England, by Margaret Frazer

Kinky Friedman: country-western singer turned sleuth, in New York City, by Kinky Friedman

Leslie Frost: secret agent and concert violinist, in Washington, DC, by Janice Weber

Reuben Frost: retired Wall Street super-lawyer and private investigator, by Haughton Murphy

Diane Fry: recently transferred to Edendale’s force, in the Peak District in England, by Stephen Booth

Josephine Fuller: queen-sized investigator in Seattle, Washington, by Lynne Murray

Sir Baldwin Furnshill: ex-Templar Knight, and Simon Puttock, medieval West County bailiff, in Devon, England, by Michael Jecks