Illiopolis is a city located in Sangamon County Illinois. With a 2020 population of 838, it is the 735th largest city in Illinois and the 15998th largest city in the United States. Illiopolis is currently declining at a rate of -0.48% annually and its population has decreased by -0.95% since the most recent census, which recorded a population of 846 in 2020. Spanning over 0 miles, Illiopolis has a population density of 1,921 people per square mile.
The average household income in Illiopolis is $69,809 with a poverty rate of 12.13%. The median rental costs in recent years comes to $705 per month, and the median house value is $86,200. The median age in Illiopolis is 40.6 years, 40.2 years for males, and 43.1 years for females.
According to the most recent ACS, the racial composition of Illiopoliswas:
Rate of Home Ownership
Average Family Size
Average Household Size
The highest rate of high school graduation is among black people with a rate of 100.00%.
The highest rate of bachelors degrees is among white people with a rate of 14.56%.
97.48% of Illiopolis residents speak only English, while 2.52% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 2.10% of the population.
Overall Poverty Rate
Male Poverty Rate
Female Poverty Rate
The race most likely to be in poverty in Illiopolis is White, with 12.74% below the poverty level.
The race least likely to be in poverty in Illiopolis is Other, with NaN% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.08%. Among those working part-time, it was 18.69%, and for those that did not work, the poverty rate was 22.77%.
Number of Veterans
Veteran Poverty Rate
Veteran Disability Rate
Labor Force Participation
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Born in Illiopolis
100.00% of Illiopolis residents were born in the United States, with 90.22% having been born in Illinois. 0.00% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.