Fairfax is a city located in Missouri. With a 2020 population of 570, it is the 449th largest city in Missouri and the 12761st largest city in the United States. Fairfax is currently declining at a rate of -0.70% annually and its population has decreased by -10.66% since the most recent census, which recorded a population of 638 in 2010. Fairfax reached it's highest population of 635 in 2010. Spanning over 0 miles, Fairfax has a population density of 1,225 people per square mile.
The average household income in Fairfax is $50,944 with a poverty rate of 23.56%. The median rental costs in recent years comes to $451 per month, and the median house value is $68,700. The median age in Fairfax is 49.6 years, 48.3 years for males, and 52.5 years for females. For every 100 females there are 97.7 males.