Fairfield, ID has a population of 462 and is the 20,029th largest city in the United States. The population density is 527 per sq mi which is 2664% higher than the Idaho average and 482% higher than the national average. The median age in Fairfield is 34 which is approximately 4% lower than the Idaho average of 36. In Fairfield, 51% of the population over 15 years of age are married, 94% speak English and 6% speak Spanish. 51% of Fairfield residents were born in Idaho, 44% were born out of state, 1% were born outside of the United States and 4% were foreign born.
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The population density in Fairfield is 2664% higher than Idaho.
The median age in Fairfield is 4% lower than Idaho.
In Fairfield 91.77% of the population is White.
In Fairfield 0.00% of the population is Black or African American.