Sandoval County was created in 1903 from the northern part ofBernalillo County. Its name comes from one of the large land-holding Spanish families in the area. The original county seat wasCorrales, but it was moved to Bernalillo in 1905.[2]
According to theU.S. Census Bureau, the county has a total area of 3,716 square miles (9,620 km2), of which 3,711 square miles (9,610 km2) is land and 5.3 square miles (14 km2) (0.1%) is water.[3] The highest point in the county is thesummit ofRedondo Peak, at 11,254 feet (3,430 m).
A relatively small portion of the county exists as a geographically separate exclave between Los Alamos County and Santa Fe County. This came about when Los Alamos County was created; the land that became the exclave would have been part of Los Alamos but was excluded owing to its sacred status among the local Indians.[citation needed] Rather than be ceded to neighboring Santa Fe (or Los Alamos) it has remained part of Sandoval, and is owned by theBureau of Indian Affairs and under the care of theSan Ildefonso Pueblo.[4][5]
Sandoval County has 12Indian reservations and two joint-use areas lying within its borders. This is the second highest number of reservations of any county in the United States (afterSan Diego County, California, which has 18 reservations.)Riverside County, California also has 12 reservations, but no joint-use areas.
As of the2020 census, the county had a population of 148,834. The median age was 41.2 years. 23.4% of residents were under the age of 18 and 19.6% of residents were 65 years of age or older. For every 100 females there were 95.1 males, and for every 100 females age 18 and over there were 91.8 males age 18 and over.[12][13]
Sandoval County, New Mexico – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
80.8% of residents lived in urban areas, while 19.2% lived in rural areas.[17]
There were 54,856 households in the county, of which 32.8% had children under the age of 18 living with them and 25.0% had a female householder with no spouse or partner present. About 22.4% of all households were made up of individuals and 10.9% had someone living alone who was 65 years of age or older.[12]
There were 58,603 housing units, of which 6.4% were vacant. Among occupied housing units, 81.9% were owner-occupied and 18.1% were renter-occupied. The homeowner vacancy rate was 1.2% and the rental vacancy rate was 6.4%.[12]
As of the2010 census, there were 131,561 people, 47,602 households, and 34,548 families living in the county.[18] The population density was 35.5 inhabitants per square mile (13.7/km2). There were 52,287 housing units at an average density of 14.1 per square mile (5.4/km2).[19] The racial makeup of the county was 68.0% white, 12.9% American Indian, 2.1% black or African American, 1.5% Asian, 0.1% Pacific islander, 11.5% from other races, and 3.9% from two or more races. Those of Hispanic or Latino origin made up 35.1% of the population.[18] In terms of ancestry, 13.2% wereGerman, 9.3% wereIrish, 8.7% wereEnglish, and 3.3% wereAmerican.[20]
Of the 47,602 households, 37.6% had children under the age of 18 living with them, 53.9% were married couples living together, 12.5% had a female householder with no husband present, 27.4% were non-families, and 22.0% of all households were made up of individuals. The average household size was 2.75 and the average family size was 3.22. The median age was 37.9 years.[18]
The median income for a household in the county was $57,158 and the median income for a family was $65,906. Males had a median income of $48,967 versus $35,101 for females. The per capita income for the county was $25,979. About 8.3% of families and 11.4% of the population were below thepoverty line, including 14.0% of those under age 18 and 10.8% of those age 65 or over.[21]
As of the2000 census,[22] there were 89,908 people, 31,411 households, and 23,621 families living in the county. Thepopulation density was 24 people per square mile (9.3 people/km2). There were 34,866 housing units at an average density of 9 per square mile (3.5/km2). The racial makeup of the county was 65.08%White, 16.28%Native American, 1.71%Black orAfrican American, 0.99%Asian, 0.11%Pacific Islander, 12.37% fromother races, and 3.47% from two or more races. 29.40% of the population wereHispanic orLatino of any race.
There were 31,411 households, out of which 38.60% had children under the age of 18 living with them, 57.70% weremarried couples living together, 12.20% had a female householder with no husband present, and 24.80% were non-families. 19.90% of all households were made up of individuals, and 6.90% had someone living alone who was 65 years of age or older. The average household size was 2.84 and the average family size was 3.29.
In the county, the population was spread out, with 29.60% under the age of 18, 7.50% from 18 to 24, 30.10% from 25 to 44, 22.20% from 45 to 64, and 10.60% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 95.20 males. For every 100 females age 18 and over, there were 91.70 males.
The median income for a household in the county was $44,949, and the median income for a family was $48,984. Males had a median income of $36,791 versus $26,565 for females. Theper capita income for the county was $19,174. About 9.00% of families and 12.10% of the population were below thepoverty line, including 15.60% of those under age 18 and 9.20% of those age 65 or over.
Since New Mexico obtained statehood in 1912, Sandoval county has been remarkably accurate in predicting the winner of each presidential race. The only elections where Sandoval County failed to back the overall winner were in 1912 (Theodore Roosevelt won the county on the Bull Moose ticket), 1944, 1968, 2016, and 2024. Hillary Clinton won a plurality, but not majority, of votes in Sandoval county in 2016 due to Gary Johnson (who previously served as Governor of New Mexico) winning an abnormally high number of votes that election. Since 2004, Sandoval County has voted more consistently Democratic in presidential elections, though at narrower margins than nearby Bernalillo County.
Most parts of the city of Rio Rancho vote majority Republican and this is where this party's strength lies. Otherwise, the more remote parts of theJemez Mountains and the town of Cuba trend Republican. However, this is offset by Corrales, Placitas, San Ysidro, and all the Pueblos in the county, as well as many other rural areas which trend Democratic. Cochiti Pueblo in particular is the most Democratic region in the county. Bernalillo has also long been a strongly Democratic region, though in the 2024 election it saw a large shift toward the Republican party, as did the pueblos of Zia and Kewa (Santo Domingo) in particular. Yet the fact that a number of precincts in Corrales and north-central Rio Rancho shifted further toward the left meant that the results of the 2024 election in this county only shifted to the right about 1.2 points from 2020.[23]
United States presidential election results for Sandoval County, New Mexico[24]