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The total population of Erwin is estimated to be 39 with 17 males (43.59%) and 22 females (56.41%). There are 5 more females than males in Erwin.
In 2022, the population of Erwin was 40, a 2.56% increase year-by-year from 2021. Previously, in 2021, Erwin's population was 39, a decline of 0.00% compared to a population of 39 in 2020.
The median age in Erwin, SD is 65.5, as per 2021 ACS 5-Year Estimates. Of the total population, 6.38% were under the age of 15, 0.00% aged 15 to 29, 42.55% aged 30 to 64, 46.81% aged 65 to 84, and 4.26% were 85 years of age and older.
Racial distribution of Erwin population: 100% are White.