Alexander Franklin James (January 10, 1843 – February 18, 1915) was a Confederate soldier and guerrilla; in the post-Civil War period, he was an outlaw. The older brother of outlaw Jesse James, Frank was also part of the James–Younger Gang.

James was born in Kearney, Missouri, to Baptist minister Reverend Robert Sallee James and his wife Zerelda (Cole) James. The couple came from Kentucky. He was of English, Welsh and Scottish descent. Frank was the oldest of three children. His father died in 1850 and his mother remarried Benjamin Simms in 1852. After his death, she married a third time to Dr. Reuben Samuel in 1855, when Frank was 13 years old. As a child, James showed interest in his late father's sizable library, especially the works of William Shakespeare. Census records show that James attended school regularly, and he reportedly wanted to become a teacher.

The American Civil War began in 1861, when James was eighteen years old. The secessionists in Missouri, including Governor Claiborne Fox Jackson, attempted to drive the Union army out of the state, but were eventually defeated. The James family was from the heavily Confederate western portion of the state. On September 13, 1861, the Missouri State Guard, including private Frank James, besieged Lexington, Missouri. James fell ill and was left behind when the Confederate forces retreated. He surrendered to the Union troops, was paroled, and was allowed to return home. On his arrival, however, he was arrested by the local pro-Union militia and was forced to sign an oath of allegiance to the Union.

After the withdrawal of regular Confederate troops in the fall of 1861, a bitter guerrilla conflict soon began between bands of pro-Confederate irregulars (commonly known as bushwhackers) and the Union homeguards. By early 1863, Frank, ignoring his parole and oath of allegiance, had joined the guerrilla band of Fernando Scott, a former saddler. He soon switched to the more active command led by William Clarke Quantrill.

Union militiamen searching for Fernando Scott raided the Samuel farm and hanged Dr. Reuben Samuel (though not fatally), Frank's stepfather, torturing him to reveal the location of the guerrillas. Shortly afterward, Frank took part with Quantrill's company in the August 21, 1863, Lawrence Massacre where approximately 200 mostly unarmed civilians were killed.

Frank James was paroled July 27, 1865^[clarify] in Nelson County, Kentucky. There is a report that after his parole, Frank was involved in a gunfight in Brandenburg, Kentucky with four soldiers that resulted in two soldiers killed, one wounded, and Frank wounded in the hip. However, there is an alternative account that claims in the autumn^[clarify] of 1865, Frank, who was in Kentucky going to Missouri, was suspected of stealing horses in Ohio and that Frank shot two members of a posse and escaped.

During his years as a bandit, James was involved in at least four robberies between 1868 and 1876 that resulted in the deaths of bank employees or citizens. The most famous incident was the disastrous Northfield, Minnesota raid on September 7, 1876, that ended with the death or capture of most of the gang.

Five months after the killing of his brother Jesse in 1882, Frank James boarded a train to Jefferson City, Missouri, where he had an appointment with the governor in the state capitol. Placing his holster in Governor Crittenden's hands, he explained,