In 2022, the population of Cardiff was 52, a 1.89% decrease year-by-year from 2021. Previously, in 2021, Cardiff's population was 53, a decline of 1.85% compared to a population of 54 in 2020.
The median age in Cardiff, AL is 37.8, as per 2021 ACS 5-Year Estimates. Of the total population, 20.83% were under the age of 15, 16.67% aged 15 to 29, 50.00% aged 30 to 64, 12.50% aged 65 to 84, and 0.00% were 85 years of age and older.