Fairchild AFB, WA has a population of 2,904 and is the 8,972nd largest city in the United States. The population density is 438 per sq mi which is 353% higher than the Washington average and 384% higher than the national average. The median age in Fairchild AFB is 22 which is approximately 41% lower than the Washington average of 38. In Fairchild AFB, 66% of the population over 15 years of age are married, 93% speak English and 6% speak Spanish. 17% of Fairchild AFB residents were born in Washington, 71% were born out of state, 8% were born outside of the United States and 3% were foreign born.