In 2022, the population of Agar was 70, a 1.45% increase year-by-year from 2021. Previously, in 2021, Agar's population was 69, an increase of 2.99% compared to a population of 67 in 2020.
The median age in Agar, SD is 62.1, as per 2021 ACS 5-Year Estimates. Of the total population, 1.05% were under the age of 15, 12.63% aged 15 to 29, 44.21% aged 30 to 64, 40.00% aged 65 to 84, and 2.11% were 85 years of age and older.