Friday Fast Fact – OOH in New Mexico: The State by Numbers. For today’s Fast Fact, let’s take a look at some OOH statistics across the 33 counties of New Mexico!. Across the state, there is quite a swing in county populations sizes. Bernalillo County, where the state’s most-populous city Albuquerque is located, has a population of 676,444 people, according to the 2020 Census. From that same Census, only 624 residents reside in Harding County, which is the state’s least-populous county. In fact, Harding County is the 13th least-populated county in the entire country!