Fairfax is a city in Linn County, Iowa, United States.

[2] It is part of the Cedar Rapids Metropolitan Statistical Area.

[5] It is located along U.S. Route 151, approximately 7 miles (11 km) southwest of downtown Cedar Rapids.

[6] As of the census of 2020,[8] there were 2,828 people, 1,083 households, and 822 families residing in the city.

There were 1,127 housing units at an average density of 375.8 per square mile (145.1/km2).

There were 803 housing units at an average density of 413.9 per square mile (159.8/km2).

18.2% of all households were made up of individuals, and 6% had someone living alone who was 65 years of age or older.

There were 336 housing units at an average density of 246.7 per square mile (95.3/km2).

17.7% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older.