In 2022, the population of Peck was 171, a 2.40% increase year-by-year from 2021. Previously, in 2021, Peck's population was 167, an increase of 1.21% compared to a population of 165 in 2020.
The median age in Peck, ID is 59.4, as per 2021 ACS 5-Year Estimates. Of the total population, 11.56% were under the age of 15, 15.03% aged 15 to 29, 36.99% aged 30 to 64, 34.68% aged 65 to 84, and 1.73% were 85 years of age and older.