John W. Irving – A former John Kinney Gang member, he fought in New Mexico’s Lincoln County War. Afterward, he joined Selman’s Scouts, a vicious gang that terrorized the county. He was robbed and killed by unknown persons in the White Sands, New Mexico Territory, in December 1878.
James Jackson – A gunman, he killed James Williams on May 12, 1884, in Lake Valley, New Mexico.
Ben Jacobs – A gunman, he killed John Findlay on November 5, 1882, in White Oaks, New Mexico.
Tom Jenkins – A gunman from Dawson, New Mexico, he shot a prostitute for shooting his brother on August 15, 1907.
Bill Johnson – A gunman who rode with Bronco Bill Walters, he was killed by Jeff Milton and George Scarborough.
Jack “Turkey Creek” Johnson (1852?-1887?) – A lawman and gunfighter, Johnson was known to be in Deadwood, South Dakota, and Dodge City, Kansas before arriving in Tombstone, Arizona. He worked as a deputy marshal with the Earps and was part of the posse that killed Frank Stillwell in Tucson, Arizona. He left town and was later killed.
William H. Johnson – A member of the Seven Rivers Warriors who fought in New Mexico’s Lincoln County War. He was killed by fellow gang member Hugh Beckwith at Seven Rivers, New Mexico, on August 17, 1878.
Richard “Dick” Johnson – A Lee gunman in the Lee-Peacock feud in Grayson County, Texas in the late 1860s, he was thought to have been Peacock’s murderer on July 1, 1871.
William H. Johnson – A gunman in the Lincoln County War of New Mexico, he was indicted in 1879 for his participation.
John A. Jones – A member of the Seven Rivers Warriors who fought in New Mexico’s Lincoln County War, he was killed a year later by fellow gang member Bob Olinger in Seven Rivers, New Mexico on August 29, 1879.
Jim P. Jones – A member of the Seven Rivers Warriors who fought in New Mexico’s Lincoln County War. He died of cancer at Carlsbad, New Mexico on February 5, 1930.
Tom Jones – A gunman in the Lincoln County War of New Mexico.
William “Bill” M. Jones – A member of the Seven Rivers Warriors who fought in New Mexico’s Lincoln County War. He died of natural causes in Carlsbad, New Mexico, on March 17, 1952.
William “Canada Bill” Jones – A gunman, he was allegedly one of the hidden snipers that shot and killed Ben Thompson and John Fisher in San Antonio, Texas, in 1884.
William Kellam, aka Cherokee Bill – A gunman for Oliver Lee in the Lee-Good feud in Tularosa, New Mexico.
Robert Kenny – A gunman, he shot and killed Julius Lancleve in March 1878 at Palomas, New Mexico.
Jack Kilmartin – A gunman and civilian Indian scout, he pursued rustlers and outlaws around Fort Sill, Oklahoma and was shot and killed while spying on rustlers.
“Cowboy Bill” King – A gunman and ranch foreman in Sonora, New Mexico, he was killed by Burt Alvord in the 1890s.
Ed King – A gunman and cowboy at the LS Ranch in Oldham County, Texas, he was killed in a shoot-out with Len Woodruff, an LX cowboy.
John Kinney – A gunman for hire and a cattle rustler, he led the John Kinney Gang. He fought in the El Paso Salt War in 1877 and for Dolan-Murphy faction in the Lincoln County War of New Mexico. He served five years in prison for rustling and died in Arizona in 1919.
George Kitt – A gunman in the Lincoln County War of New Mexico, he rode with the posse that killed John Tunstall on February 18, 18 78.
John Joseph KIoehr – A gunman and resident of Coffeyville, Kansas Kloehr was credited with having shot and killed Bob Dalton, Bill Broadwell, Grat Dalton, and Texas Jack, and having wounded Emmet Dalton during the Dalton gang’s attempted raid on two Coffeyville banks. Kloehr died of natural causes in 1927.
Charles Kresling – A gunman in the Lincoln County War of New Mexico, he was indicted for his participation.
“Dutch Charlie” Kruling – A member of the Seven Rivers Warriors who fought in New Mexico’s Lincoln County War. After the war was over, he disappeared from history.