Mount Pleasant is a city in Maury County, Tennessee, United States. Mount Pleasant was the birthplace of 19th-century writer and humori…Mount Pleasant is a city in Maury County, Tennessee, United States. Mount Pleasant was the birthplace of 19th-century writer and humorist Samuel R. Watkins and formerly titled "The Phosphate Capital of the World." The population was 4,561 at the 2010 census, and 4,784 in 2020.