In 2022, the population of Parker was 301, a 0.67% increase year-by-year from 2021. Previously, in 2021, Parker's population was 299, a decline of 0.33% compared to a population of 300 in 2020.
The median age in Parker, ID is 31.2, as per 2021 ACS 5-Year Estimates. Of the total population, 19.25% were under the age of 15, 30.28% aged 15 to 29, 42.80% aged 30 to 64, 7.66% aged 65 to 84, and 0.00% were 85 years of age and older.