The Aztec Ruins National Monument, on 318 acres, consists of dwellings and sacred structures built by Ancient Pueblo Indians in the 12th and 13th Centuries.
Shiprock (Tsé Bitʼaʼí, "rock with wings") is a 27 million year old volcanic rock formation, designated as a National Natural Landmark, rising 1,583 feet above the desert.
The eggs and hoodoos in the Bisti Wilderness were formed in sand and silt revealed 73 million years ago when the Western Interior Seaway receded.
The San Juan River is a 383 mile long major tributary of the Colorado River and a primary drainage for the Four Corners.
The La Plata Mountains, seen from San Juan County, are a small subrange of the San Juan Mountains in sw Colorado, and includes Hesperus Mountain at 13,332 feet.
Bisti/De-Na-Zin Wilderness (Bisti Badlands) is a 45,000-acre wilderness area full of rock formations made of sandstone, shale, mudstone, and silt.
Navajo Lake is a 3800 feet long and 400 feet deep reservoir located in northeastern San Juan County, created from a dam completed in 1962.
Angel Peak Scenic Area is located 15 miles south of Bloomfield in San Juan County, with over 10,000 acres of rugged terrain, badlands and deep canyons.

County Demographics


With a median age of 36.9, San Juan County's population is a little "younger" than the median age of populations in New Mexico (39.1) and the U.S. (38.8).

Median Age (2021)
Under 18 Years Old
65 Years and Over


San Juan County has a culturally diverse population, with 43% Native American, 22% Hispanic, and 36% White non-Hispanic residents.


San Juan County overall is geographically rural, with over 5500 square miles, and a population density of 22.1 people per square mile. One-third of the population (33.7%) lives in a rural area, compared to 22.6% across New Mexico.
Square Miles
People per Sq Mile
Live in Rural Area
Age & Race Ethnicity Estimates: Census, American Community Survey 5-year estimates:,NM/PST045221
5-year estimates are used for Age and Race/Ethnicity, as these are more accurate for subpopulation estimates. These estimates do not, though, reflect population changes over the last four to five years.

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