Lebanon is the county seat of Wilson County, Tennessee, United States. The population was 26,190 at the 2010 census and an estimated 36,479 in 2019. Lebanon is located in Middle Tennessee, approximately 25 miles (40 km) east of downtown Nashville. Lebanon is part of the Nashville Metropolitan Statistical Area.
The city was incorporated in 1801, and was named after the biblical cedars of Lebanon (Cedrus libani). Local residents have called Lebanon "Cedar City", mostly a reference to the abundance of cedar trees in the area. The city is home to Cumberland University, a small, private four-year liberal arts institution.
According to the United States Census Bureau, the city has a total area of 38.63 square miles (100.1 km2), of which 38.5 square miles (100 km2) is land and 0.03% is water.
Lebanon has a humid subtropical (Köppen Cfa) with mild winters and hot summers. Under the Trewartha climate classification, it is a temperate oceanic (Do) climate due to only 7 months having a mean 50 °F (10 °C) or higher.