County · code 49037
San Juan CountyUtah
San Juan County is a county in Utah, with its seat in Monticello, established in 1880.
- Founded1880
- County seatMonticello
- Named forSan Juan River
- Land area7,820 sq mi + 113 sq mi water
- Population14,518 2020 Census
- Parcels mapped9,246 checked 15 October 2026
Where it is
San Juan on the map of Utah
Utah has 29 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1880 from Iron County, Kane County and Piute County
An old deed may name a county that no longer exists, or a boundary that has since moved.
San Juan County was created by Utah Territory on February 17, 1880, from parts of Iron, Kane, and Piute counties. It was named after the San Juan River. San Juan became a county in the state of Utah on January 4, 1896.
- 1880San Juan County created San Juan created by Utah Territory from Iron, Kane, and Piute. · Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11
- 1896Became part of Utah San Juan became a county in the state of Utah. · U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159
- 1901Changed Legislature authorized Grand to gain all of San Juan, dependent on local referendum. Referendum failed at election held in 1901; change did not take effect. · Utah Laws 1901, 4th sess., ch. 120, pp. 128-129; McPherson, 319-320
- 1962Changed Utah Supreme Court ruled in favor of San Juan and confirmed that the boundary between San Juan and Grand was 38 degrees, 30 minutes north latitude. Grand contended the boundary was the south line of township 26 south (no change). · "San Juan Co. v. Grand County," in Utah Rpts., 2d ser., vol. 13:242-246
Land and parcels
What the maps cover in San Juan
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 9,246 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 20 December 2024 · checked 15 October 2026 -
Address points Missing
No public address points layer found for San Juan County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
San Juan by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
San Juan County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of San Juan County.
See your own lot on these maps
Open San Juan County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about San Juan County
- When was San Juan County founded?
- San Juan County was founded in 1880, formed from Iron County, Kane County and Piute County, and named after San Juan River.
- What is the county seat of San Juan County?
- The county seat of San Juan County is Monticello.
- Is there an online parcel map for San Juan County?
- Yes. A public source publishes a parcel map of 9,246 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has San Juan County's boundary or name changed?
- San Juan County was created in 1880 from Iron County, Kane County and Piute County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Grand County.
- Is my lot in a flood zone?
- We do not have flood maps for San Juan County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby