Fairfield is a city located in Washington. With a 2020 population of 642, it is the 223rd largest city in Washington and the 12236th largest city in the United States. Fairfield is currently growing at a rate of 1.26% annually and its population has increased by 4.90% since the most recent census, which recorded a population of 612 in 2010. Fairfield reached it's highest population of 642 in 2021. Spanning over 1 miles, Fairfield has a population density of 1,043 people per square mile.
The average household income in Fairfield is $80,819 with a poverty rate of 7.86%. The median rental costs in recent years comes to $1,010 per month, and the median house value is $155,300. The median age in Fairfield is 43.7 years, 44.6 years for males, and 38.7 years for females. For every 100 females there are 110.6 males.