Mt. Juliet is a city located in western Wilson County, Tennessee, United States. A suburb of Nashville, it is approximately 17 miles (27 km) east of downtown Nashville. Mt. Juliet is located mostly between two major national east-west routes, Interstate 40 and U.S. Route 70. As of the 2020 United States census, Mount Juliet has a population of approximately 39,289 people. Mt. Juliet is the largest city in Wilson County. The official city charter has the name listed as Mt. Juliet; however, the United States Postal Service lists its name as Mount Juliet.

Wilson County is a county in the U.S. state of Tennessee. It is in Middle Tennessee. As of the 2020 census, the population was 147,737. Its county seat is Lebanon. The largest city is Mt. Juliet. Wilson County is part of the Nashville-Davidson–Murfreesboro–Franklin, TN Metropolitan Statistical Area.