DuPage County Phone Directory

DuPage County is the second most populated county in Illinois with more than 953,000 residents. The county seat is Wheaton, and that is where most county offices are based. The DuPage County phone directory covers every government department from the county board to animal services. All of the main offices sit along County Farm Road in Wheaton. This page lists the phone numbers, addresses, and hours you need to reach the right department in DuPage County without getting bounced around.

DuPage County Government Phone Directory

The DuPage County government center is at 421 N. County Farm Road in Wheaton, IL 60187. The main phone number is (630) 407-6400. Offices are open Monday through Friday from 8:00 am to 4:30 pm. Most departments share this campus, so if you drive out to Wheaton you can visit several offices in one trip. But calling first saves time because some offices require appointments or have their own hours that differ from the main building.

The DuPage County website is the official hub for all county departments and services. From there you can find contact pages, forms, and online tools for many common requests. The county also runs a department directory page that lists every office with its phone number, email, and physical location. That page is useful when you need a direct number rather than going through the main switchboard.

The Illinois state government homepage is the starting point for finding state-level contacts and services that affect DuPage County residents.

State agencies often handle things that cross county lines, so this page can help when your question goes beyond DuPage County offices.

Note: DuPage County closes at 4:30 pm, which is earlier than Cook County and some other nearby offices that stay open until 5pm.

DuPage County Department Phone Numbers

Each DuPage County department has its own direct phone line. The County Board office takes calls at 630-407-6023. The County Clerk is at 630-407-5500 and also takes email at countyclerk@dupagecounty.gov. The clerk handles vital records, elections, and various county filings. For court matters, the Circuit Court Clerk picks up at 630-407-8700. These are the three most called numbers in the DuPage County phone directory.

The Sheriff handles non-emergency calls at 630-682-7256. The State's Attorney office is at 630-407-8000, and you can also email sao@dupagecounty.gov. The Public Defender answers at 630-407-8300. The Recorder takes calls at 630-407-5400 or email at recorder@dupagecounty.gov for questions about property deeds and document recordings. Under the Local Records Act (50 ILCS 205), the Recorder's office must preserve all recorded documents and make them available to the public.

DuPage County also runs several service departments with their own lines. The Health Department answers at 630-682-7400. Animal Services picks up at 630-407-2800. The Coroner's office is at 630-407-2600, and you can reach the coroner directly by email at Richard.Jorgensen@dupagecounty.gov. The Auditor's office takes calls at 630-407-6075.

Note: Most DuPage County departments share the 630-407 prefix, so double-check the last four digits before you dial.

Phone Directory for DuPage County Clerk

The DuPage County Clerk is one of the busiest offices in the county. Call 630-407-5500 for general questions. The clerk handles birth certificates, death certificates, marriage licenses, and election services. Most of these records are public. The office sits in the main county building in Wheaton at 421 N. County Farm Road.

If you need copies of vital records, you can start the process by phone and then pick them up in person or get them by mail. The clerk's phone directory staff can walk you through what forms you need and what the fees are. DuPage County charges standard fees for certified copies, and those fees are set by state law. The phone number is the fastest way to confirm current processing times, since those can change depending on how busy the office is.

DuPage County Records and FOIA

The Illinois Freedom of Information Act gives you the right to request public records from DuPage County. Under 5 ILCS 140, any person can ask for records held by a public body. That includes phone directories, staff contact lists, department rosters, and office memos. DuPage County must respond within five business days. The first 50 pages of black-and-white copies are free. Color copies and large requests may have a fee attached.

The DuPage County contact page lists each department along with the name and contact details of its FOIA officer. You can submit a written request by mail, by email, or in person at the county building in Wheaton. Most people use email because it is faster and you get a written record of your request. The county has a legal duty to respond, and if they deny your request they must tell you why and point you to the appeal process.

The Illinois FOIA contacts page is a good backup resource that lists FOIA officers at the state level, many of whom can help point you to the right local contact.

This state-level page is especially useful when your records request crosses between DuPage County and a state agency.

Reaching DuPage County by Phone

Getting through to the right person at DuPage County is simpler than in many larger counties. The campus in Wheaton is compact, and most departments are in the same building or right next door. If you call the main number at (630) 407-6400, the operator can connect you to any department. But using a direct number from this phone directory will save time.

A few things to keep in mind when calling DuPage County offices:

• Offices open at 8am and close at 4:30pm Monday through Friday
• Call volume is heaviest on Monday mornings
• Have your account or case number ready before you dial
• Email is an option for non-urgent questions at most departments
• The county website has online forms that can replace some phone calls

Wednesday and Thursday tend to have the shortest hold times. If you get a voicemail, leave your name, number, and a brief message about what you need. DuPage County staff usually call back within one business day. For urgent matters, call the main switchboard and ask for a supervisor.

Cities in DuPage County Phone Directory

DuPage County includes several cities and villages that run their own local government offices. Each city below has its own phone directory page with contacts for city hall, police, fire, and other local departments. These are separate from the county offices and handle city-level services like water, sewer, zoning, and building permits.

Naperville is the largest city in DuPage County by population. Wheaton is the county seat and where most county offices sit. Each city page above has local department phone numbers so you can call the right office for city-level questions.

Nearby County Phone Directories

DuPage County sits in the western suburbs of Chicago and borders four other counties. Some residents live near a county line and may need to call offices in the neighboring county for certain services. Property that straddles a county boundary, for instance, could involve two different assessor offices. The links below take you to the phone directory pages for each neighboring county.