[2] Valencia County is included in the Albuquerque Metropolitan Statistical Area.

The county was a significant bellwether region that held the longest record for predicting presidential election winners until 2020.

As of the 2000 census,[9] there were 66,152 people, 22,681 households, and 17,350 families living in the county.

18.8% of all households were made up of individuals, and 6.4% had someone living alone who was 65 years of age or older.

As of the 2010 census, there were 76,569 people, 27,500 households, and 19,967 families living in the county.

[14] Valencia County once held the longest active streak of voting for the winner of U.S. presidential elections, breaking for the nationwide winner in every presidential election from 1952 to 2016.

[16] In 2020, both it and Vigo County, Indiana broke their streaks dating back to the 1950s (since 1956 in Vigo) by selecting Donald Trump over eventual winner Joe Biden, leaving Clallam County, Washington, whose streak extends back to 1980, as the holder of longest-running presidential bellwether.

[17] Before 1952, its record is less reliable; the only other Democratic president it voted for was Franklin D. Roosevelt in 1936.