In 2022, the population of Swan was 77, a 2.67% increase year-by-year from 2021. Previously, in 2021, Swan's population was 75, a decline of 1.32% compared to a population of 76 in 2020.
The median age in Swan, IA is 47.6, as per 2021 ACS 5-Year Estimates. Of the total population, 20.41% were under the age of 15, 14.29% aged 15 to 29, 53.06% aged 30 to 64, 10.20% aged 65 to 84, and 2.04% were 85 years of age and older.