[2] The county is named for Benjamin Logan, who had been second in command of the Kentucky militia during the American Revolutionary War and was a leader in bringing statehood to the area.

Future President Andrew Jackson fought a pistol duel against Charles Dickinson at Harrison's Mill in Logan County on May 30, 1806.

[6] During the post-Reconstruction period, there was considerable racial violence by white mobs against black citizens in Logan County.

[7] Four men were killed in a mass lynching on August 1, 1908, in Russellville, during the civil unrest associated with the Black Patch Tobacco Wars.

Sharecroppers Joseph Riley, and Virgil, Robert, and Thomas Jones,[8] the last three members of the same family, were all hanged from the same cedar tree.

[9] Logan was a major tobacco-growing county, with Dark Fired Tobacco produced by a special smoke processing.

In late 1907 and early 1908, hundreds of Night Riders conducted raids against tobacco warehouses in some Kentucky towns.

[12] Its highest point (868 feet/265 meters ASL) is Rainbow Rock Knob WSW, located 3.6 miles (5.8 km) ESE from Russellville.