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The total population of Belknap is estimated to be 138 with 49 males (35.51%) and 89 females (64.49%). There are 40 more females than males in Belknap.
In 2022, the population of Belknap was 88, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Belknap's population was 88, an increase of 1.15% compared to a population of 87 in 2020.
The median age in Belknap, IL is 34.2, as per 2021 ACS 5-Year Estimates. Of the total population, 15.95% were under the age of 15, 32.52% aged 15 to 29, 42.33% aged 30 to 64, 8.59% aged 65 to 84, and 0.61% were 85 years of age and older.
Racial distribution of Belknap population: 97.55% are White and 2.45% are multiracial.