Jan Fabel: Scottish-German police detective (Kriminalhauptkommissar), in Hamburg, Germany, by Craig Russell

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

Kevin Fahey, a dead former second-rate cop, mediocre husband, and absent father, in the Dead Detective series by Chaz McGee (Katy Munger)

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

Bradford Fairfax: a gay 30-something special agent with a secret organization called Box 77, by Jeffrey Round

Charlotte Fairfax, formerly the costume mistress of the Royal Shakespeare Company, now working as a costume designer for a small company in upstate New York, in the Shakespeare in the Catskills mysteries by Elizabeth J. Duncan

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

Robert Fairfax: private tutor in the 1760s in and around London, England, by Hannah March (Tim Wilson)

Sandy Fairfax: a ’70s teen idol, now 38 years old and making a comeback, in 1990s southern California, by Sally Carpenter

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

Erica Falck: writer, and Patrik Hedstrom, a police detective, in the fishing town of Fjällbacka, Sweden, by Camilla Läckberg 

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

Javier Falcon: detective inspector in Spain, by Robert Wilson

Giulia Falcone: former nun now working for Frank Driscoll, an ex-cop private investigator, in Pennsylvania, by Alice Loweecey 

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)

Kate Fallon: young woman during World War Two in a small town in Pennsylvania, in the Homefront mysteries, by M.T. Jefferson (H. Paul Jeffers)

Diane Fallon: forensic anthropologist, museum director and reluctant detective, by Beverly Connor

Peter Fallon: antiquarian bookseller involved in Harvard intrigues, and later hunting historical treasures with Evangeline Carrington, in Boston, Massachusetts, by William Martin

Marten Fane: retired police detective in San Francisco, California, by Paul Harper (David Lindsey)

Octavius Fanks: detective at Scotland Yard, in London, England, by Fergus Hume

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

Ottilia Fanshawe: former companion to Dowager Lady Polbrook now married to Lord Francis Fanshawe, in Regency England, in the Lady Fan mysteries by Elizabeth Bailey

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

Sam and Remi Fargo: treasure hunters, by Clive Cussler with Grant Blackwood

Abby Faria: bike courier and fledgling private investigator based in the Kensington Market area of Toronto, Ontario, Canada, by Vivian Meyer

Rita Farmer: aspiring actress and single mother, in Los Angeles, California, by Elizabeth Sims

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

Darby Farr: real estate agent returning from California to her old hometown of Hurricane Harbor, Maine, by Vicki Doudera

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)

Rosie Featherby: child raised by her Aunt Maggie and Uncle Bert running a Soho cafe in early 1950s London, England, by Pip Granger

Renata Fechter: head of a squad of eco-cops in Germany, by Julian Rathbone

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

Anna Fekete: senior detective constable of Yugoslav-Hungarian extraction in Northern Finland, by Kati Hiekkapelto

Casey Feldstein, a dessert chef inheriting her aunt's Yarn2Go business, in the Yarn Retreat series by Betty Hechtman

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

Edna Ferber, the author, by Ed Ifkovic

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

Michele Ferrara: Chief Superintendent of the Squadra Mobile, in Florence, Italy, by Michele Giuttari

Emma-Joy “EJ” Ferris: 30-something medically-retired military policewoman, now a security officer with the Fernglen Galleria, in Vernonville, Virginia, near Washington DC, in the Mall Cop series by Laura DiSilverio

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

Suzie Fewings: genealogist discovering interesting secrets in her family history, in England, by Fay Sampson

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

Thomas Finbow: master falconer in late 16th century London and Berkshire, England, by John Pilkington

Septimus Finch: large, bland detective inspector, later Chief Inspector, in England, by Margaret Erskine

Peter Finley: TV reporter in New York City, by Mike Lupica

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

Scott Finn: lawyer in Boston, Massachusetts, by David Hosp

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

Story Fischer: beekeeper in the fictional small town of Moraine, Wisconsin, in the Queen Bee mysteries by Hannah Reed (Deb Baker)

Syd Fish: former political press secretary, now a private investigator, in Sydney, Australia, by Susan Geason

Andy Fisher: unorthodox FBI Special Agent, by Jim DeFelice

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

Max Fisher: wealthy businessman, and Angela Petrakos, his sexy assistant, starting out in New York City, by Ken Bruen and Jason Starr

Jeremy Fisk: detective in the NYPD intelligence division, in New York City, by Dick Wolf

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

Giovanna (Gigi) Fitzgerald, leaving New York City to run a gourmet shop in Woodstone, Connecticut, in the Gourmet De-Lite mysteries by Peg Cochran

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

Kevin Fitzgerald: private investigator in New York City, by Tom Topor

Nell Fitzgerald: former Manhattan publishing professional now helping her grandmother, Eleanor Cassidy, run a quilting store in the Hudson River town of Archer’s Rest, New York, in the Someday Quilts mysteries by Clare O’Donohue

Sydney Fitzpatrick: FBI forensic artist in San Francisco, California, by Robin Burcell

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

Webster Flagg: black former actor and singer, living on his investments but also working as a cook and butler, in New York City, by Veronica Parker Johns

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

Helena Flemming: a solicitor, and Dr. John Eisenmenger, a former forensic pathologist in charge of St. Benjamin’s Museum of Anatomy and Pathology, in England, by Keith McCarthy

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

Robert Flick: parole officer in New York, by Jack Ehrlich

Grace Flint: undercover British police inspector involved in international intrigue, by Paul Eddy

Lacey Flint: a young detective constable in London, England, by S.J. Bolton

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

Frank Flynn: Bureau of Land Management agent, in the Mojave Desert of southern California, in the Desert Sky mysteries, by David Sundstrand

Kelly Flynn: corporate accountant from Washington DC, who has relocated to Ft. Connor, Colorado and is learning to knit at the House of Lambspun, 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

The Flynn Brothers: private investigators inheriting a haunted mansion in New Orleans, Louisiana, by Heather Graham

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

Sean Fogarty: lawyer in the fictional college town of Silvertown, in northern Wisconsin, by Warren Carrier

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

Frank Foote: police inspector, later a home renovator, in the Norwood Flats area of Winnipeg, Manitoba, Canada, by Alison Preston

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

Alan Ford: connoisseur and gentleman private investigator, in New York City, by Carolyn Wells

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

Jessica Ford: young attorney surviving the death of the First Lady in a car crash, and Secret Service agent Mark Ryan, in Washington, DC, by Karen Robards

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

Jack Forrester: in charge of the Special Investigations Unit of the South African Police Service, in Durban, South Africa, in The Secret Trilogy, by Rafe McGregor

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

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

Malin Fors: 30-something divorced mother of a teenage daughter, and an ambitious detective inspector, in Linköping, Sweden, by Mons Kallentoft

Liz Forsyth: RCMP Inspector based in Ottawa, Ontario, Canada, and Stephen Hay, a Detective Chief Inspector at Scotland Yard, in London, England, by Janet Brons

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

Bern Fortin: former Canadian Forces commander, working for the coroner in the small town of Kootenay Landing, in British Columbia, Canada, by Deryn Collier

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

Theresa Fortunato: tarot-reading psychic, and Oliver Jardine, a police detective, in Los Angeles, California, by Kate Green

Chester Fortune: a man of violence in a violent world, by Thomas H. Stone (Terry Harknett)

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

Reginald Fortune: surgeon and medical consultant to Scotland Yard, in London, England, by H.C. Bailey

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

Grant Foster: Detective Chief Inspector working with Nigel Barnes, genealogist, in London, England, by Dan Waddell

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

Molly Fountain: widowed Englishwoman and thriller writer after WWII, on the French Riviera, by Dennis Wheatley

Anthony Fowler: former priest, CIA operative, and member of the Vatican’s secret service, by Juan Gómez-Jurado

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

Dani Fox: ambitious young assistant district attorney, in mid-1970s Westchester County, New York, by Jeanine Pirro

Malcolm Fox: cop working for the Complaints, the police internal affairs division, in Edinburgh, Scotland, by Ian Rankin

Tommy Fox: Detective Chief Superintendent, and the raffish, cockney head of the Flying Squad, in London, England, by Graham Ison

Lindsey Fox, Bonnie Lynn Tyler, and Margaret Ann Matthews, cousins at Pinckney Plantation on fictional Indigo Island, South Carolina, by Caroline Cousins

Madeleine Fox: detective inspector in London, England, by Colin Falconer

Nick Fox: international thief and con man, and Kate O’Hare, FBI agent and former Navy Seal, in the Fox & O’Hare mysteries by Janet Evanovich and Lee Goldberg

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

Skyler Foxe: a gay high school English teacher in Redlands, California, in a romantic mystery series by Haley Walsh (Jeri Westerson)

Superintendent Francis Foy by Lionel Black

Reynold Frame: young freelance writer and photographer, and amateur sleuth, in New York City and New England, by Herbert Brean

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

Lucas Frank: retired forensic psychiatrist, by John Philpin

Alton Benjamin “Rooster” Franklin: retired car thief, ex-con, and gambler, mostly in Kansas City, Missouri, by Randy Russell

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

Rose Franklin, who leaves her cheating husband and, when her car breaks down, settles in Shady Grove campsite in West Memphis, Arkansas, by Jackie Lynn

Charles Fraser: idealistic MP and former intelligence agent, and his wife Mélanie, a war refugee, in Regency London, England, by Tracy Grant

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

Elliot Freed: recently divorced writer and proprietor of an old movie theater, in New Jersey, in the Double Feature mysteries by Jeffrey Cohen

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

Courtney Frome: sassy freelance journalist who investigates crimes, in Australia, by Carmel Bird

Gerald Frost (Nighthawk), who steals jewelry from the immoral rich, in England, by Sydney Horler

Dr. Henry Frost: in England, by Josephine Bell

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

Joe Frye: the only female homicide detective in the Miami-Dade Police Department (and Louis Kincaid’s lover), in Miami, Florida, by P.J. Parrish

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

Nell Fury: lesbian private investigator in San Francisco, California, by Elizabeth Pincus

David Fyfe: detective chief inspector in Edinburgh, Scotland, by William Paul