In 2022, the population of Ortley was 48, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Ortley's population was 48, a decline of 2.04% compared to a population of 49 in 2020.
The median age in Ortley, SD is 57.5, as per 2021 ACS 5-Year Estimates. Of the total population, 4.17% were under the age of 15, 12.50% aged 15 to 29, 43.75% aged 30 to 64, 39.58% aged 65 to 84, and 0.00% were 85 years of age and older.