Robert Lacy (18??-1877) – Gambler, scoundrel, and gunfighter, Lacy was lynched in Rawlins, Wyoming in 1877, after having swindled several people in the area.
Smith Lea – A gunman, he killed Catarino Romero in June 1885 at Lincoln, New Mexico.
Bob Lee – A gunman, he was a friend of Dick Rogers in Raton, New Mexico, and two attempted to break a friend out of jail in Springer.
Oliver Milton Lee (1866-1941) – One of the best gunfighters in the Old West, he was the primary agitator in the Lee-Good feud in Tularosa, New Mexico. He was accused but found innocent of having A.J. Fountain killed and was an enemy of Pat Garrett.
Kitty LeRoy (1850-1878) – A gunfighter and gambler, she was one of the Old West’s best women gamblers. In 1876 she ran a saloon in Deadwood, South Dakota. Her many lovers included Sam Bass and Wild Bill Hickok. Her fifth husband grew jealous and killed her in 1878.
Nashville Franklin “Buckskin Frank” Leslie (1842-1925?) – A friend to the Earps in Tombstone, Arizona and deadly gunman, he killed ten to 13 men, including Mike Killeen and Billy Claibourne, in 1881 and claimed he killed Johnny Ringo.
Lincoln County Regulators (1878) – Opposing the Dolan-Murphy faction in Lincoln County, New Mexico over the control of the county, the Lincoln County Regulators began as a deputized posse seeking revenge for the death of their boss and friend, John Tunstall.
John Long, aka “Long John” ( 18??-??) – The first record of John Long in the Old West was when he got into a gunfight in the lawless settlement of Fort Griffin, Texas in 1876 and killed two men — one Vergil Hewey and an unknown black soldier who was assigned to the fort. Long then moved on to Lincoln County, New Mexico, where he worked as a deputy sheriff and was with the posse that killed John, which triggered the Lincoln County War. On April 1, 1878, he, along with Sheriff William Brady, George Hindman, Billy Matthews, and George Peppin, were ambushed by a group led by Billy the Kid. He would later be a prominent figure in the climactic four-day battle in Lincoln. When the violence finally abated, Long evidently either settled down or disappeared, as his name was soon lost to history.
“Big” Steve Long (18??-1868) – Known mostly as a professional gunman, Long also was a lawman and an outlaw. When outlawry became his main objective in 1868, he was lynched by a vigilante mob in Laramie City, Wyoming on October 28.
William Preston Longley, aka: Wild Bill, Rattling Bill, Tom Jones, Jim Patterson, Jim Webb, Bill Black, Bill Henry, Bill Jackson (1851-1878) – Texas outlaw Bill Longley was from a respectable family, but his hot temper, his fondness for liquor, and unsettled conditions during reconstruction led him to become one of the most daring gunfighters of his day. He is said to have killed 32 persons before he was captured and hanged on October 11, 1878.
“Cock-Eyed” Frank Loving (1860?-1882) – Still in his teens, Loving was involved in the Richardson-Loving gunfight at the Long Branch Saloon, in Dodge City, Kansas, in 1879. He was later involved in the Trinidad, Colorado Saloon gunfight in 1882, where he was shot dead.
Joseph “Rowdy Joe” Lowe (1845-1899) – Joseph Lowe, aka “Rowdy Joe” Lowe, was a gambler, saloon keeper/owner, and gunfighter in the Old West. Hailing from Illinois, Joe and his wife Kathryn, who was known as “Rowdy Kate,” made their way to Kansas roaming through the various cowtowns. After building a reputation as a gunman Lowe was finally shot down in Denver, Colorado.
Aban Lucero – A gunman, he shot and killed a man in Galisteo, New Mexico, on February 9, 18 91.
Martiniano Lujan – A gunman, he shot and killed Martias Mirival on February 21, 18 90, near Lincoln, New Mexico.
Melchior Luna – A gunman, he shot Manuel Sanchez on February 20, 1883, in Belen, New Mexico.