| 1 | Dog | | Walt's dog. |
| | Faulkner | | One of the railroad engineers. |
| | Mike | Niall | An old rancher. |
| | Pat | | Bar owner. |
| | Cady | | Walt's daughter. |
| | Victoria | Moretti | Absaroka County undersheriff. Aka: Vic. |
| | Mary | Barsad | Primary suspect in Wade Barsad's murder. |
| | Sandy | Sandberg | Campbell County sheriff. |
| | Walter | Longmire | Absaroka County sheriff. Aka: Walt. |
| | Kyle | Straub | Prosecuting attorney. |
| | Cato | | Cheyenne elder. |
| | Lucian | Connally | Former sheriff of Absaroka County. |
| | Ernie | Brown | Editor in chief of the Durant Courant. |
| | Ruby | | Absaroka County dispatcher. |
| | Henry | Standing Bear | Walt's friend. |
| | Dorothy | Caldwell | Busy Bee Café owner. |
| | Bill | Nolan | Walt's former schoolmate. |
| | Wade | Barsad | Mary's husband. |
| | Juana | Balcarcel | Bartender. |
| | Benjamin | | Juana's son. |
| | Eric | Boss | Runs Boss Insurance. |
| 2 | Cliff | Cly | Worked for Wade. |
| | Hershel | Vanskike | Worked for the Barsads. |
| | T. J. | Sherwin | Head of the DCI investigators. |
| 3 | Black Diamond | Wahoo Sue | Mary Barsad's horse. |
| | Michael | | Vic's brother. |
| | Alphonse | | Vic's uncle. |
| | Isaac | Bloomfield | Town doctor. |
| 4 | Willis | Barnecke | One of Wade Barsad's former names. Aka: Canary. |
| | Joey | Venuto | Barnecke's boss. Aka: Suits. |
| | Wallace | Balentine | One of Wade Barsad's former names. |
| | | Saizarbitoria | One of Walt's deputies. |
| | Double | Tough | One of Walt's deputies. |
| | Chuck | Frymire | One of Walt's deputies. |
| | | Basquo | One of Walt's deputies. |
| | | Sancho | One of Walt's deputies. |
| | Marie | | Sancho's wife. |
| | Joe | Meyer | Attorney General. |
| | Mary | | Joe's wife. |
| 5 | Steve | Lawrence | Radio DJ. |
| | Rose | | Cly's girl. |
| | Wiggle | | Rose's unborn child's name. |
| 6 | Sidney | | Owner of the Powder River Red Crown Service Station. |
| | Wendell | Barnecke | Wade's brother. |
| | Sheldon | Siegel | Wendell's lawyer. |
| | Larry | Brannian | Auctioneer. |
| 7 | Virgil | White Buffalo | Former inmate. |
| | Steve | Miller | The telephone man. |
| | Jessie | | Steve Miller's daughter. |
| | Rezdawg | | Henry Standing Bear's truck. |
| 8 | Martha | | Walt's late wife. |
| | Tom | Groneberg | Walt's tenant. |
| | Carter | | Tom Groneberg's son. |
| | Jennifer | | Tom Groneberg's wife. |
| | Thomas | Wolfe | American novelist. |
| 9 | Buster | | A black bear. |
| | Gary | Hasbrouk | Henry's opponent. |
| | D. J. | Sorenson | Cly's first opponent. |
| | Ken | Colbo | Cly's second opponent. |
| 10 | John | Boertlein | One of the men from Chicago. |
| | Bud | Ardary | One of the men from Chicago. |
| | Janine | | Dr. Bloomfield's nurse. |
| | Mari | Baroja | Lucian Connally's late ex-wife. |
| | Lana | | Mari's granddaughter. |
| 11 | Jim | Rogers | Mechanic. |
| 12 | Dena | Many Camps | One of the Cheyenne people. |
| 13 | John J. | Audubon | American ornithologist, naturalist, and painter. |
| Epi | Mike | Pilch | Veterinarian. |
