WebIn 2021, Coconino County, AZ had a population of 145k people with a median age of 31.5 and a median household income of $61,888. Between 2020 and 2021 the population of Coconino County, AZ grew from 142,254 to 144,942, a 1.89% increase and its median household income grew from $59,000 to $61,888, a 4.89% increase.