The total population of Buffalo Gap is estimated to be 123 with 72 males (58.54%) and 51 females (41.46%). There are 21 less females than males in Buffalo Gap.
In 2022, the population of Buffalo Gap was 143, a 5.93% increase year-by-year from 2021. Previously, in 2021, Buffalo Gap's population was 135, an increase of 4.65% compared to a population of 129 in 2020.
The median age in Buffalo Gap, SD is 64.8, as per 2021 ACS 5-Year Estimates. Of the total population, 10.83% were under the age of 15, 5.00% aged 15 to 29, 35.00% aged 30 to 64, 49.17% aged 65 to 84, and 0.00% were 85 years of age and older.