Laclede County is a county located in the U.S. state of Missouri. As of the 2020 census, the population was 36,039. Its county seat is Lebanon. The county was organized February 24, 1849, and was named after Pierre Laclède, founder of St. Louis.

Lebanon is a city in and the county seat of Laclede County in Missouri. The population was 14,474 at the time of the 2010 census. It is the county seat of Laclede County. The Lebanon Micropolitan Statistical Area consists of Laclede County.