Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones the agency reported to the FBI, through 2025. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and September 26, 2026.
Peru, Illinois, in LaSalle County, has about 9,800 residents (2024 Census Bureau estimate), and its arrests are reported to the FBI by an agency of its own. An arrest in the city leaves the same records whoever makes it: the arresting agency's report, the record of anyone held at the county jail, and, if the State's Attorney files charges, a case in the Circuit Court of LaSalle County. This guide says who keeps each one, what it costs and who may see it, with the arrest counts the agency reported.
This guide covers who makes arrests, how many arrests, booking and the jail, finding an arrest, copies and common questions.
Related guides: Peru public records, LaSalle County arrest records, Illinois arrest records and Illinois inmate search.
Who Makes Arrests in Peru
The FBI lists Peru with an arrest reporting agency of its own, filed as Peru Police Department. It reported 173 arrests for 2025. A city is listed separately whether the officers are the city's own or the sheriff's under contract; the FBI's list does not say which.
Outside the city, the La Salle County Sheriff's Office is the county agency. It reported 240 arrests for 2025.
The FBI's agency list also places one more agency in LaSalle County: Tri-County Drug Enforcement Narcotics Team (other).
How Many Arrests Peru Reports
Each agency reports its arrests to the FBI by month, and the FBI publishes them on the Crime Data Explorer. These are the full-year totals, all offenses, as the FBI held them on October 8, 2026; a year with months missing or not reported is left out.
- Peru: 173 for 2025, 176 for 2024, 244 for 2023 and 175 for 2022.
Peru's 173 arrests in 2025 were down 1.7 percent from 176 in 2024.
Through August 2026, Peru reported 150 arrests, against 116 in the same months of 2025.
Across LaSalle County, the 13 agencies with all twelve months of 2025 on file reported 2,788 arrests between them.
Booking: Where People Arrested in Peru Are Held
The county jail is where a person arrested in Peru and kept in custody ends up, whichever agency made the arrest, though a city department may hold someone in its own cells first and a person cited and released at the scene is never booked. The jail's record of each person held, with the charges, is a public record of the arrest, and once the person is released or sentenced the record continues in the court file.
On an average day in 2019 the jail held about 110 people. Its rated capacity in 2019 was 306 beds, and it ran at 37 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the custody page of the La Salle County Sheriff's Office at lasalleso.com/inmateSearch (page title: LaSalle Parish Sheriff's Office (LA)), which answered when SearchSystems opened it on September 23, 2026.
That page is the place to look for someone who was booked recently; a person cited and released at the scene, or held only a few hours by a city department, will not be on it.
A sentence of more than a year is served in state prison; the Illinois Department of Corrections lists its inmates at idoc.illinois.gov/offender/inmatesearch.html.
How to Find Out About an Arrest in Peru
An arrest in Peru can be traced in two places, depending on where the case stands: the custody page of the La Salle County Sheriff's Office described above, for anyone booked into the county jail; the State's Attorney, which decides whether an arrest becomes a charge (its page is at lasallecountyil.gov/m/directory/department?did=30, phone 815-434-8340).
Illinois is one of the states that lets anyone look up another person's statewide criminal history: conviction information is public under the Uniform Conviction Information Act, through the Illinois State Police. That record shows what agencies reported to the state, which is wider than one county's court index but can lag it.
Getting a Copy of an Arrest Record in Peru
An arrest report belongs to the agency whose officer wrote it, and that agency releases it, not the court or the jail. Under the Illinois Freedom of Information Act the agency must answer within 5 business days, with one 5-day extension, and it may charge copying only after the first 50 pages.
- An arrest by the Peru police: the police records page SearchSystems verified at peru.il.us/government/freedom-of-information/foia-information (page title: FOIA Information | City of Peru Illinois 61354), phone (815) 223-2267, 2650 N. Peoria Street, Peru, IL 61354, which answered when SearchSystems opened it on September 26, 2026.
- An arrest by the La Salle County Sheriff's Office: ask its records unit.
- A defendant who has been charged gets the report through the case: the State's Attorney, 815-434-8340, handles discovery for pending cases.
- Any county record that is not posted: the county records request page SearchSystems verified is at lasallecounty.com (page title: FOIA/Public Records).
- Your own statewide record: a name-based or fingerprint-based request to the Illinois State Police.
The LaSalle County guide covers every agency in the county: LaSalle County arrest records.
Frequently Asked Questions
How many arrests are made in Peru each year?
Peru reported 173 arrests to the FBI for 2025, its latest full year.
How do I find out if someone is in jail in Peru?
Look on the custody page of the La Salle County Sheriff's Office at lasalleso.com/inmateSearch. It covers people booked into the county jail.
Where are people arrested in Peru booked?
Those kept in custody go to the county jail, run by the La Salle County Sheriff's Office; a person cited and released at the scene is not booked.
Are arrest records public in Peru?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Illinois State Police: conviction information is public under the Uniform Conviction Information Act. The arrest report itself is released by the agency that made the arrest, under the Illinois Freedom of Information Act.
How do I get a copy of an arrest report in Peru?
From the agency that made the arrest: the Peru police for its own arrests, the La Salle County Sheriff's Office for the sheriff's. Under the Illinois Freedom of Information Act the answer is due within 5 business days, with one 5-day extension; the county records request page SearchSystems verified is at lasallecounty.com.
Is this the official Peru website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.
