In 2022, the population of Naples was 99, a 1.00% decrease year-by-year from 2021. Previously, in 2021, Naples's population was 100, a decline of 1.96% compared to a population of 102 in 2020.
The median age in Naples, IL is 47.6, as per 2021 ACS 5-Year Estimates. Of the total population, 4.76% were under the age of 15, 17.46% aged 15 to 29, 51.59% aged 30 to 64, 25.40% aged 65 to 84, and 0.79% were 85 years of age and older.