In 2022, the population of Union was 171, a 3.39% decrease year-by-year from 2021. Previously, in 2021, Union's population was 177, a decline of 1.12% compared to a population of 179 in 2020.
The median age in Union, AL is 36.7, as per 2021 ACS 5-Year Estimates. Of the total population, 2.77% were under the age of 15, 5.04% aged 15 to 29, 72.04% aged 30 to 64, 18.39% aged 65 to 84, and 1.76% were 85 years of age and older.