Monticello is a city located in the state of Utah, United States. It serves as the county seat for San Juan County and is the second most populous municipality within that county, recording a population of 1,824 during the 2020 census.
The area was settled in July 1887 by pioneers from the Church of Jesus Christ of Latter-day Saints. The city was named in honor of Thomas Jefferson's estate and officially became the county seat in 1895 before being incorporated as a city in 1910.