Bernalillo County U.S. county Bernalillo County Courthouse in Albuquerque Bernalillo County Courthouse in Albuquerque Flag of Bernalillo County Flag Official seal of Bernalillo County Seal Map of New Mexico highlighting Bernalillo County Location within the U.S. state of New Mexico Map of the United States highlighting New Mexico New Mexico's location within the U.S. Coordinates: 35°03′N 106°40′W Country United States State New Mexico Founded 1852 Seat Albuquerque Largest city Albuquerque Area • Total 1,167 sq mi (3,020 km2) • Land 1,161 sq mi (3,010 km2) • Water 6.4 sq mi (17 km2) 0.5%% Population • Estimate (2016) 676,953[1] • Density 571/sq mi (220/km2) Time zone UTC−7 (Mountain) • Summer (DST) UTC−6 (MDT) Congressional districts 1st, 2nd, 3rd Website www.bernco.gov Bernalillo County is the most populous county in the U.S. state of New Mexico.[2] As of the 2010 census, the population was 662,564.[3] The county seat, Albuquerque,[4] is the most populous city in New Mexico. Bernalillo County is the central county of the Albuquerque, NM Metropolitan Statistical Area.