Lake Koshkonong is an unincorporated community of 714 in Jefferson County, about 15 miles north of downtown Janesville · Updated November 2026
Is Lake Koshkonong, WI safe?
Yes. Crime is low across most of the US, and lower still in Lake Koshkonong: an overall CrimeGrade™ of A+, safer than the neighborhoods where 97% of Americans live. Violent and property crime both grade A+ here.
A+
Overall CrimeGrade™
Safety score 983 of 1,000Safer than nearly all US neighborhoodsi What this means
97% of Americans live in neighborhoods with more crime than Lake Koshkonong as a whole, and 3% in neighborhoods with less. The typical US neighborhood has a safety score of 838, a CrimeGrade™ of A-. Lake Koshkonong scores 983.
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 Lake Koshkonong, WI at ISP Reports.
Who this page is for: homeowners and renters in Lake Koshkonong, 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
Crime rates and types in Lake Koshkonong
CrimeGrade™ estimates Lake Koshkonong has about 6.5 reported crimes a year for every 1,000 residents, 82% less than the US as a whole and 73% less than Wisconsin.
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.
Theft is the most common crime in Lake Koshkonong, about 44% of everything reported.
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 Lake Koshkonong compares with nearby cities
Lake Koshkonong has the least crime of its 10 nearest cities.
Nearest first, with each place's distance from Lake Koshkonong. Beside each overall CrimeGrade™ is its safety score, from 0 to 1,000 (higher is safer).
Compared with cities of similar size and density, Lake Koshkonong is safer than 71% of them.
Counting police, courts and prisons as well as victims' losses, crime costs Lake Koshkonong about $139 a year per household, 88% 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 $180,000 a year, or $251 per resident.
How the cost breaks down
Crime
Cost a year
Per resident
Murder
$14,000
$20
Rape
$3,200
$5
Robbery
$150
under $1
Assault
$12,000
$17
Burglary
$2,800
$4
Theft
$10,000
$15
Vehicle theft
$2,900
$4
Arson
$160
under $1
Vandalism
$7,200
$10
Total
$53,000
$74
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 Lake Koshkonong 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 Lake Koshkonong, WI average a SchoolGrade of B+: 48% of students test proficient, against 47% projected for schools like them. Overall, they meet expectations. See schools in Lake Koshkonong on SchoolGrade
