St. Clair County Phone Directory

St. Clair County is one of the older and more populated counties in southern Illinois, with more than 251,000 residents. The county seat is Belleville, and that is where most government offices are based. This St. Clair County phone directory pulls together the main phone numbers, office addresses, and department contacts you might need when reaching out to local government. From the county clerk to the sheriff and the circuit court, all of the key lines are listed on this page. You can also find links to official St. Clair County websites where staff directories and department pages are posted.

St. Clair County Main Office Phone Numbers

The St. Clair County government building sits at 10 Public Square in Belleville, IL 62220. The main phone number is (618) 277-6600. This line connects you to the county switchboard, and from there the operator can route your call to any department. The County Board also picks up at that same number. Most offices run on a standard Monday through Friday schedule, though hours can vary by department. If you are not sure which office to call, start with the main line and ask to be transferred.

The St. Clair County website is the hub for all official department pages and contact info. You can browse the site to find direct phone lines, staff names, and office locations for each department in the county.

The county keeps a full online phone directory that lists every department and its direct number. You can view the St. Clair County phone directory page for a complete list of contacts sorted by department.

That page is kept up to date by the county and shows each office name along with its phone number and extension.

St. Clair County Department Contacts

St. Clair County has a number of departments that each handle different types of government work. The County Clerk can be reached at 618-277-6600 ext. 2608. This office deals with vital records, elections, and general county filings. The Circuit Clerk picks up at 618-277-6600 and handles court records, case filings, and court fees. The Sheriff's office has its own line at 618-277-3500. Call that number for law enforcement questions or to ask about warrants and inmate info. The Treasurer is at 618-277-6600 for tax payment questions.

Each of these offices sits in or near the main county building on Public Square. Some departments share the main phone number but use different extensions. Others have standalone lines. The phone directory for St. Clair County makes it simple to find the right contact. Here are a few of the most called departments:

• County Board: 618-277-6600
• County Clerk: 618-277-6600 ext. 2608
• Circuit Clerk: 618-277-6600
• Sheriff: 618-277-3500
• Treasurer: 618-277-6600

Note: Extensions may change when offices move or staff shifts, so check the county website if a number does not connect.

Phone Directory for St. Clair County Clerk

The St. Clair County Clerk is one of the busiest offices in the county. This department handles birth and death records, marriage licenses, voter registration, and other filings that residents need on a regular basis. The clerk's direct extension is 618-277-6600 ext. 2608, but the office also has its own website with forms and search tools.

The St. Clair County Clerk website lets you access forms, look up election results, and find more details about the services this office provides.

That site is separate from the main county page and has its own set of tools for looking up records and getting forms. If you need to call the clerk, have your request type ready so they can point you to the right person fast.

Under the Illinois Local Records Act (50 ILCS 205), the county clerk must keep and preserve all local public records. That law applies to vital records, election files, and any other documents this office manages. St. Clair County takes that seriously and keeps archives going back many years.

St. Clair County Contact Page

If you need to reach a department that is not listed above, the county runs a general contact page on its website. The St. Clair County contact page has a full form you can fill out, plus it lists email addresses and phone numbers for various offices.

That page is useful when you are not sure which department to call. Fill out the form with your question, and someone from the county will route it to the right place.

The county also keeps a departments page that shows every office in the county government along with a brief description of what each one does. This is one of the best starting points when you need to figure out which office handles your type of request.

Use that page to drill down into specific departments and find staff phone numbers, office hours, and physical locations for each one.

St. Clair County Phone Directory and FOIA

If you need a full copy of the St. Clair County staff directory or a list of department phone numbers that goes beyond what is posted on the website, you can file a Freedom of Information Act request. The Illinois FOIA law (5 ILCS 140) gives you the right to access public records from any government body in the state. Phone directories and staff contact lists are public records in Illinois.

Most FOIA requests in St. Clair County get a response within five business days. The first 50 pages of any request are free. After that, there is a small per-page fee. You can send your request by mail to 10 Public Square, Belleville, IL 62220, or check the county website for an email option. Make sure to be specific about what you are asking for so the county can process it without delays.

The Illinois State Records Act (5 ILCS 160) works alongside FOIA and sets rules for how long government agencies must keep their records. This law also established the State Archives, which stores historical records from across Illinois. St. Clair County follows both of these laws when managing its public records.

How to Use This Phone Directory

Finding the right number in St. Clair County starts with knowing which department you need. Tax questions go to the Treasurer. Court matters go to the Circuit Clerk. Vital records like birth or death certificates go to the County Clerk. If you are not sure, the main switchboard at (618) 277-6600 is the best place to start. The operator can transfer you or give you a direct line.

Most offices in St. Clair County are open during regular business hours on weekdays. Calling in the morning tends to mean shorter hold times. If you call right at opening, you are more likely to get through on the first try. Mid-week calls, especially on Tuesdays and Wednesdays, tend to go faster than Mondays or Fridays when call volume spikes. Have your case number or account info ready before you call so the staff can help you without putting you on hold again.

St. Clair County Cities Phone Directory

St. Clair County has several cities and villages with their own local government offices. The two largest cities in the county are Belleville and O'Fallon, and both have their own phone directory pages on this site. Each city page lists local department contacts, office hours, and links to the city website so you can get in touch with the right office at the city level instead of the county.

City offices handle things like local police, fire, water, streets, and city clerk services. The county handles courts, the sheriff, and countywide departments. Knowing which level of government to call saves time.

Nearby County Phone Directories

St. Clair County sits in the Metro East region of Illinois, just across the river from St. Louis, Missouri. Madison County borders it to the north and is the closest neighboring county with a phone directory page on this site. If you live near the county line, you might need to call offices in both St. Clair and Madison counties for certain records or services.