What you can find with an Illinois license plate lookup
An Illinois license plate lookup lets you find basic vehicle information tied to a specific plate number. The Secretary of State's office maintains this data, and you can search it through their online system. What you'll get back depends on who you are and why you're asking — a private citizen gets different information than a law enforcement officer or insurance company.
If you own the vehicle or have the owner's permission, you can learn the vehicle identification number (VIN), the registered owner's name, the vehicle make and model, and the registration expiration date. You cannot look up the owner's address, phone number, or other personal details through a public search — that information is restricted.
If you're trying to find out who owns a vehicle you saw in an accident or a parking lot, a public lookup won't give you that. You'll need to file a police report or work through your insurance company, both of which have access to restricted databases.
Key Takeaways
- The Illinois Secretary of State website lets you search vehicle information by license plate number at no cost.
- Public searches return the VIN, vehicle make and model, and registration status, but not the owner's personal contact information.
- If you need owner information for an accident or dispute, contact the police or your insurance company instead of attempting a public search.
- You can also search by VIN or vehicle title number if you don't have the plate number.
How to search the Illinois Secretary of State database
Go to the Illinois Secretary of State website and find the vehicle information lookup tool. This is usually located under the "Vehicle Services" or "Registration" section. You'll see a search box where you can enter the license plate number — use only the letters and numbers on the plate, with no spaces or hyphens.
Enter the plate number and select "Search." The system will return the vehicle's registration status, VIN, make, model, year, and expiration date if the plate is registered in Illinois. If the search returns no results, the plate may be inactive, expired, or registered in a different state.
The search is free and does not require you to log in or create an account. Results appear when ready on the screen.
What information is and isn't available in a public search
A public license plate lookup through the Secretary of State will show you the vehicle details — what it is and whether it's currently registered. You will see the VIN, which you can use to run a vehicle history report through services like Carfax or AutoCheck if you want to know about past accidents, title issues, or service records.
The system will not show you the registered owner's name, address, phone number, email, or driver's license number. These details are considered personal information and are protected from public view. Even if you can see that a vehicle is registered, you cannot use that search to identify who owns it.
If you need to contact the owner — for example, after a minor accident in a parking lot — you have two options: leave a note on the vehicle with your contact information, or file a police report and ask the officer to contact the owner on your behalf.
Searching by VIN or title number instead of plate
If you have the vehicle identification number (VIN) but not the license plate, you can search by VIN instead. The Secretary of State lookup tool accepts VIN searches on the same page. Enter the full 17-character VIN and the system will return the same vehicle information, including the current plate number if one is registered.
You can also search by Illinois vehicle title number if you have it. This is useful if you're checking on a vehicle you recently purchased or are in the process of buying. The title number appears on your title certificate and on registration documents.
When to contact the Secretary of State directly
If your search returns an error, shows unexpected information, or you believe a plate is registered to the wrong vehicle, contact the Illinois Secretary of State's office directly. You can reach them by phone or through their website contact form. Have the plate number, VIN, or title number ready when you call.
Common reasons to contact the office include discovering a duplicate plate number, finding that your vehicle shows as unregistered when you know it's current, or needing to verify information before buying a used vehicle from a private seller.
Using plate lookup information when buying a used vehicle
Before you buy a used car from a private seller, run a plate lookup to confirm the vehicle's registration status and get the VIN. Cross-check the VIN on the title certificate the seller shows you — they must match. If the VIN on the title doesn't match the VIN in the registration system, do not complete the purchase until the discrepancy is resolved.
Once you have the VIN, use a vehicle history report service to check for outstanding liens, title brands (like "salvage" or "flood"), accident history, and odometer readings. The Secretary of State lookup confirms the vehicle is currently registered; the history report tells you whether it's safe to buy.
Reporting a vehicle or plate issue
If you see a vehicle with a fake, altered, or stolen plate, report it to local police with the plate number, vehicle description, and location. Do not attempt to follow or confront the driver. Police have access to law enforcement databases that can identify the registered owner and determine whether the plate is legitimate.
If you believe your own plate has been cloned (copied by someone else), contact the Illinois Secretary of State and your local police department. Provide both your registration documents and any evidence that another vehicle is using your plate number.
Frequently Asked Questions
Can I find out who owns a vehicle using just the license plate?
No, the public lookup does not show owner names or contact information. If you need to identify an owner — for an accident, parking damage, or a hit-and-run — file a police report. Police have access to restricted databases and can contact the owner on your behalf.
What do I do if the lookup shows my vehicle as unregistered?
Contact the Illinois Secretary of State to verify your registration status. Bring your registration certificate and proof of payment. If your registration lapsed, you'll need to renew it before driving the vehicle legally.
Is the Secretary of State lookup the same as a vehicle history report?
No. The Secretary of State lookup shows current registration status and basic vehicle details. A vehicle history report (from Carfax, AutoCheck, or similar services) shows accident history, title brands, service records, and ownership changes. You need both for a complete picture when buying used.
Can I look up a plate from another state?
The Illinois Secretary of State database only covers Illinois-registered vehicles. For out-of-state plates, contact that state's Department of Motor Vehicles or equivalent agency. Each state maintains its own registration database.
Do I need to pay to use the license plate lookup?
No, the Illinois Secretary of State's vehicle information lookup is free. Be cautious of third-party websites that charge fees for the same information — you can always access it directly from the state at no cost.