The total population of Fairfield is estimated to be 196 with 78 males (39.80%) and 118 females (60.20%). There are 40 more females than males in Fairfield.
In 2022, the population of Fairfield was 125, a 2.46% increase year-by-year from 2021. Previously, in 2021, Fairfield's population was 122, an increase of 3.39% compared to a population of 118 in 2020.
The median age in Fairfield, KY is 59.6, as per 2021 ACS 5-Year Estimates. Of the total population, 6.53% were under the age of 15, 8.54% aged 15 to 29, 63.32% aged 30 to 64, 20.60% aged 65 to 84, and 1.01% were 85 years of age and older.