Bernalillo County is the most populous county in the U.S. state of New Mexico. As of the 2020 census, the population was 676,444. The county seat, Albuquerque, is the most populous city in New Mexico.

The Albuquerque Metropolitan Statistical Area, sometimes referred to as Tiguex, is a metropolitan area in central New Mexico centered on the city of Albuquerque. The metro comprises four counties: Bernalillo, Sandoval, Torrance, and Valencia. As of the 2010 United States Census, the MSA had a population of 887,077. The population is estimated to be 923,630 as of July 1, 2020, making Greater Albuquerque the 61st-largest MSA in the nation. The Albuquerque MSA forms a part of the larger Albuquerque–Santa Fe–Las Vegas combined statistical area with a 2020 estimated population of 1,165,181, ranked 49th-largest in the country.