In 2022, the population of Calvin was 234, a 2.90% decrease year-by-year from 2021. Previously, in 2021, Calvin's population was 241, a decline of 0.82% compared to a population of 243 in 2020.
The median age in Calvin, LA is 38.0, as per 2021 ACS 5-Year Estimates. Of the total population, 23.96% were under the age of 15, 17.71% aged 15 to 29, 45.31% aged 30 to 64, 13.02% aged 65 to 84, and 0.00% were 85 years of age and older.