BernalilloYou can now get your Auto dealer license in New Mexico. Bernalillo is a town in Sandoval County, New Mexico, USA. As in the 2000-census, the city population was 6,611. It is the county seat of Sandoval County. The average income for a household in the city was $ 30,864, and the median income for a family was $ 36,286. Males had a median income of $ 27,417 against $ 22,125 for females. The per capita income of the city was $ 13,100. Approximately 13.9% of families and 18.2% of the population below the poverty line, including 25.4% of those under 18 and 16.3% of those aged 65 or over.