Illiopolis is a village of 1,350 in Sangamon County, about 20 miles east of Springfield · Updated November 2026
How common is violent crime in Illiopolis?
Violent crime is low in Illiopolis: an A+, safer than the neighborhoods where 79% of Americans live. Assaults make up 92% of it, and most of those are simple assaults, which involve no weapon and no serious injury.
A+
Violent crime CrimeGrade™
Safety score 940 of 1,000Less violent crime than most US neighborhoodsi What this means
79% of Americans live in neighborhoods with more violent crime than Illiopolis as a whole, and 21% in neighborhoods with less. The typical US neighborhood has a violent crime safety score of 860, a CrimeGrade™ of A. Illiopolis scores 940.
Crime is concentrated in a small share of places, so most neighborhoods score high on the 0 to 1,000 scale. That is why a score in the 800s can still mean more violent crime than most US neighborhoods.
How to read the map: each area's color compares its violent crime with the people who spend time there, on one national scale, from green for the least to red for the most. Each area gets its own color, so a busy downtown or nightlife strip can show red while the homes around it stay green. The interactive maps load faster on a solid connection. Compare high speed internet in Illiopolis, IL at ISP Reports.
Who this page is for: homeowners and renters in Illiopolis, and anyone thinking about buying or renting a home there.
Business and enterprise customers: this free map shows neighborhood areas. CrimeGrade™ business reports map crime at about 66-meter detail and estimate it for one address and type of business. See business reports
Violent crime rates and types in Illiopolis
CrimeGrade™ estimates Illiopolis has about 13 reported violent crimes a year for every 1,000 residents, about the same as the US as a whole and 20% less than Illinois.
All violent crime
Assaults
Robbery
Reported crimes a year, per 1,000 residents. Violent crime here includes simple assaults, which the FBI's violent crime rate leaves out.
Assault is the most common violent crime in Illiopolis, about 92% of the total.
Each CrimeGrade™ here compares a violent crime with the people who spend time in an area, not only the people who live there. Rates count crimes per 1,000 residents.
Select a crime's name to see its map above. CrimeGrade™ business reports map each crime at about 66-meter detail.
Where and when violent crime happens in Illiopolis
The Sangamon County Sheriff's Office polices Illiopolis, and these figures cover every place it serves, 2022 to 2024.
In Illiopolis, 70% of aggravated assaults happen at a home, against 53% nationally.
Crime
Most often at
Busiest time
Aggravated assault
Homes (70%)
Evening (6 pm to midnight)
Shares of the crimes reported to police, 2022 to 2024. Reports with no time recorded are left out of the times.
Violent crime in Illiopolis and nearby cities
Illiopolis has the most violent crime of its 2 nearest cities.
Nearest first, with each place's distance from Illiopolis. Beside each violent crime CrimeGrade™ is its safety score, from 0 to 1,000 (higher is safer).
Compared with cities of similar size and density, Illiopolis has more violent crime than 78% of them.
Counting the pain and suffering of victims, violent crime costs Illiopolis about $1.6 million a year, or $1,153 per resident. The costs that reach a bill, such as medical care, lost work and the justice system, come to about $340,000, or $254 per resident.
Billed cost of violent crime per resident, per year
How the cost breaks down
Pain and suffering are about 78% of that full cost.
Crime
Cost a year
Per resident
Murder
$80,000
$59
Rape
$79,000
$59
Robbery
$5,500
$4
Assault
$180,000
$132
Total
$340,000
$254
How CrimeGrade™ works
The violent crime CrimeGrade™ covers murder, rape, robbery and assault, from A+ for the least crime to F for the most, on one scale for the whole country.
It weighs each violent crime against the people who spend time in an area, so a busy downtown is graded on its workers and visitors as well as its residents.
The rates on this page count crimes for every 1,000 people who live here, the way police departments report them. Illiopolis is a good example: many people work in, shop in or visit it, so its crime per resident looks worse than its CrimeGrade™ suggests.
Comparisons with US neighborhoods use the Census Bureau's block groups, small areas of about 1,400 residents, and count the people who live in each. The figures count crimes reported to police; many crimes, shoplifting above all, never are. Behind the grades, CrimeGrade™ tested 21,607 factors from 125 data families. For business owners, paid CrimeGrade™ location reports estimate crime at a single address for each type of business.
Where the numbers come from
Crime reports that police departments file with the FBI
State crime records and city crime data, where they are published
Published research on what crime costs victims and communities
These are estimates of reported crime for whole areas, not a record of what happened on any one street. CrimeGrade™ updates them once a year and provides them free and without guarantee. Check local sources before you rely on them for a decision.
