Monticello, UtahSan Juan County Seat
(Settled in 1888)
Named for President Thomas Jefferson's summer residence in Virginia. Formerly called Hammond.
Community Facts
- County: San Juan
- Coordinates: 37.8714, -109.3429
- Elevation: 7,070 ft.
- Population: 1,824 (616 households)
- Area Code: 435
- Prefixes: 298, 419, 459, 587
Gardening Info
- Hardiness Zone: 6b
- Annual Precipitation: 15.9 in.
1991-2020 precipitation normals
Sources
- Location and elevation: USGS
- Founding and name: Adapted from Origins of Utah Place Names
- Population and households: 2020 Census
- Hardiness zone: USDA
- Annual precipitation: PRISM
- Area codes and phone prefixes: NANPA
Nearby Communities
by Beehive Guide. Updated Oct. 19, 2026.