The Safest and Most Dangerous Places in Mercer County, IL
Mercer County is home to 15,500 residents and includes Aledo and Viola · Updated November 2026
Is Mercer County, IL safe?
Yes. Crime is low across most of the US, and lower still in Mercer County: an overall CrimeGrade™ of A+, safer than the neighborhoods where 94% of Americans live. Violent and property crime both grade A+ here. Every neighborhood in Mercer County grades A+.
A+
Overall CrimeGrade™
Safety score 973 of 1,000Safer than nearly all US neighborhoodsi What this means
94% of Americans live in neighborhoods with more crime than Mercer County as a whole, and 6% in neighborhoods with less. The typical US neighborhood has a safety score of 838, a CrimeGrade™ of A-. Mercer County scores 973.
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 crime than most US neighborhoods.
How to read the map: each area's color compares its crime with the people, homes and cars there, on one national scale, from green for the least crime to red for the most. Each area gets its own color, so a busy shopping center can show red while the homes beside it stay green. The interactive maps load faster on a strong connection. Compare high speed internet in Mercer County, IL at ISP Reports.
Who this page is for: homeowners and renters in Mercer County, 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
What stands out in Mercer County
Theft runs low. Mercer County has 4.3 thefts a year per 1,000 residents, less than half the US rate of 13.1.
How places in Mercer County compare
Every part of Mercer County where people live grades A or B on the national scale.
100%
A or B 100%
Share of residents, by the overall CrimeGrade™ of the area they live in.
Cities and towns in Mercer County with at least 1,000 residents. Ranked by overall CrimeGrade™; beside each grade is its safety score, from 0 to 1,000 (higher is safer), and the other numbers are residents.
Across the county, the northeast side has the least crime and the Aledo area the most.
Crime rates and types in Mercer County
CrimeGrade™ estimates Mercer County has about 21 reported crimes a year for every 1,000 residents, 43% less than the US as a whole and 50% less than Illinois.
Overall crime
Violent crime
Property crime
Reported crimes a year, per 1,000 residents. These figures include simple assaults and vandalism, which the FBI's violent and property crime rates leave out.
Assault is the most common crime in Mercer County, about 33% of everything reported, and it also accounts for the largest share of what crime costs here.
Each CrimeGrade™ compares a crime with what it affects: people for assaults and robbery, homes for burglary, parked cars for vehicle theft. 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.
How Mercer County compares with nearby counties
Mercer County has less crime than 7 of its 10 nearest counties.
Two things set Mercer County apart: it has 20 jobs for every 100 residents, against 45 for the US as a whole, and 34% of the land where people live lit at night, against 78% nationally. Places like that tend to report less theft and robbery, and theft runs low here.
Residents in dense blocksBlocks of 10,000 or more people per square mile. Dense neighborhoods tend to report more robbery.NoneUS: 24%Lower than for 99% of Americans
JobsJobs draw daytime crowds. Places with many jobs tend to report more theft and robbery.20 for every 100 residentsUS: 45Lower than for 98% of Americans
Walk GradeBestNeighborhood's grade for getting through daily life on foot, traced along real walking routes to shops, schools and parks. Walkable places tend to report more theft. 88% of residents here live in car-dependent areas.D- (11 of 100)US: 21Lower than for 77% of Americans
Show all 6
Stores and restaurantsShops and restaurants draw crowds and parked cars. Places with many stores tend to report more theft.7.5 per 1,000 residentsUS: 10.5Lower than for 94% of Americans
Lit at nightSatellite images show which neighborhoods are lit at night, a sign of busy streets and businesses. Brightly lit places tend to report more theft and vandalism.34% where people liveUS: 78%Lower than for 92% of Americans
Transit serviceBuses and trains an hour at the evening rush. Places with busy transit tend to report more theft and robbery. BestNeighborhood's Transit Grade for Mercer County: F (0 of 100).NoneUS: noneLower than for 86% of Americans
These traits tend to go with more or less crime; none of them causes it on its own. Sources: Census job counts and housing figures, OpenStreetMap and Overture business listings, CrimeGrade™ parking estimates, NASA night-light imagery, US Forest Service tree cover, EPA transit data and BestNeighborhood's Walk Grade.
What crime costs Mercer County
Counting police, courts and prisons as well as victims' losses, crime costs Mercer County about $562 a year per household, 53% less than the US figure of $1,205.
Cost of crime per resident, per year
Counting the pain and suffering of victims, which comes almost entirely from violent crime, the full cost comes to about $11 million a year, or $712 per resident.
How the cost breaks down
Crime
Cost a year
Per resident
Murder
$540,000
$35
Rape
$590,000
$38
Robbery
$22,000
$1
Assault
$990,000
$64
Burglary
$390,000
$25
Theft
$340,000
$22
Vehicle theft
$150,000
$10
Arson
$46,000
$3
Vandalism
$620,000
$40
Total
$3.7 million
$239
How CrimeGrade™ works
A CrimeGrade™ shows how much crime an area has compared with the rest of the country, from A+ for the least crime to F for the most. Every neighborhood in the US is graded on the same scale, so a B in Mercer County means the same as a B anywhere else.
CrimeGrade™ starts from the crimes people report to police and measures each kind of crime against what it affects: people for assaults, homes for burglaries, parked cars for car thefts.
The rates on this page count crimes for every 1,000 people who live here, the way police departments report them.
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.
Schools in Mercer County, IL average a SchoolGrade of C+: 43% of students test proficient, against 28% projected for schools like them. Overall, they meet expectations. See schools in Mercer County on SchoolGrade
