Lincoln Logs are a toy consisting of minature logs, about 1-2cm in diameter. Analogous to real logs used in a log cabin, Lincoln Logs have notches in their ends, so that small model log buildings can be built. In addition, a Lincoln Log set has windows and doors, to make the buildings more realistic. More modern sets also come with figures of humans and animals that match the scale of the buildings. The sets invoke the history of the American frontier, with such sets as the Pony Express or the Conestoga Homestead.

Lincoln Logs were invented in 1916 by John Lloyd Wright, son of Frank Lloyd Wright. John Lloyd Wright said he was inspired by the architecture of the basement of the Imperial Hotel in Tokyo.