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.