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Illinois · Metro St. Louis · #257 Most Populous County in the US
Madison County, Illinois
Illinois's gateway to the St. Louis metro - from Edwardsville's Southern Illinois University campus and Granite City's steel heritage to Alton's Mississippi River bluffs and Lewis and Clark history, the Cahokia Mounds World Heritage Site, and the rapidly growing communities along I-270. Property tax, courts, public records, and senior services for Madison County residents.
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Madison County's assessment ratio means effective tax rates are low — but incorrect appraisals still cost money. Ownwell manages the appeal with no upfront cost.
Office: Madison County Sheriff’s Office – 405 Randle Street, Edwardsville, IL 62025 (jail and sheriff’s office in the same building; jail capacity 312 beds). Confirm current sheriff and phone via madisoncountyil.gov.
Notes: For an active emergency, call 911. Edwardsville was heavily affected by the December 10-11, 2021 tornado outbreak, when an EF3 tornado struck and collapsed an Amazon warehouse in the county, killing six workers and injuring many others – a genuine, sobering local tragedy referenced here with care.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: I-55/70/255 serve Edwardsville, the county seat; Granite City is the county’s largest city. Madison County is part of the Metro East region of Greater St. Louis.
Notes: Madison County was established September 14, 1812, from Randolph and St. Clair Counties by proclamation of Illinois Territory Governor Ninian Edwards, named for President James Madison, a friend of Edwards. At its formation, the county’s territory was vast, encompassing all of modern Illinois north of St. Louis as well as all of Wisconsin, part of Minnesota, and Michigan’s Upper Peninsula. Madison County is Illinois’s eighth-most populous county today and the most populous in southern Illinois.
Business & Permits
BUILDING & PERMITS
Office: Madison County Courthouse – Edwardsville, IL (current building, a four-story neoclassical white-marble structure rising to six stories at the rear, constructed 1913-1915).
Notes: Edwardsville was chosen as county seat with its first public building – a jail – erected in 1814, following commissioner meetings held at the home of Thomas Kirkpatrick in 1813. The historic Madison County Sheriff’s House and Jail (210 N. Main Street, built 1869, opened 1871, Second Empire, builder Alonzo Keller) was the oldest Madison County government building in Edwardsville, featuring a three-story sheriff’s residence with an adjacent cell block later expanded in 1904 for female prisoners; it was listed on the National Register of Historic Places from 1980 until its 2020 delisting. Edwardsville is home to Southern Illinois University Edwardsville, and the pre-Columbian Cahokia Mounds World Heritage Site lies nearby, close to Collinsville.
Veterans Services
VETERANS SERVICES
Office: Madison County Veterans Assistance Commission – confirm current contact via madisoncountyil.gov.
Libraries
LIBRARIES
Edwardsville Public Library (Edwardsville) – confirm current address/phone via the county library system.
Parks & Recreation
PARKS & RECREATION
Key Assets: The Cahokia Mounds World Heritage Site (near Collinsville), Southern Illinois University Edwardsville’s campus, and downtown Edwardsville’s historic district are the county’s premier heritage and cultural attractions.
Notes: The genuine proximity of Madison County to the Cahokia Mounds World Heritage Site – one of the most significant pre-Columbian archaeological sites in North America – is among the standout local facts covered in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Madison County Assessor’s Office – confirm current contact via madisoncountyil.gov.
Animal Services
ANIMAL SERVICES
Confirm current dedicated shelter contact via madisoncountyil.gov; Madison County Sheriff’s Office for animal control arrangements.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Madison County Environmental Health – confirm current contact via madisoncountyil.gov.
NOTES: Madison County is the fifty-seventh county completed in Illinois’s Round 3 v2 redo, under the A+ sourced standard established for this project. The genuine proximity of Madison County to the Cahokia Mounds World Heritage Site is among the standout local facts covered in this project. The 2021 tornado tragedy at the Edwardsville Amazon warehouse is referenced factually and with appropriate care. All contact information above was sourced via web search as of early August 2026 and should be reconfirmed directly with the relevant office before a visit, deadline-sensitive filing, or emergency-adjacent decision.
About Madison County
Madison County is Illinois’s fifth most populous county outside the Chicago metro and the 257th most populous in the United States, covering 741 square miles of southwestern Illinois across the Mississippi River from St. Louis.
Edwardsville (the county seat, population ~25,000) is Madison County’s most affluent and fastest-growing city, home to Southern Illinois University Edwardsville (SIUE) (enrollment ~13,000) and a thriving downtown that has benefited from St. Louis metro spillover growth. The city’s National Great Rivers Museum at the Melvin Price Locks and Dam on the Mississippi River provides educational programming on river ecology and commerce.
Granite City (population ~28,000) is Madison County’s largest city and its industrial heart – a former steel production center whose Granite City Works (US Steel) was one of the largest steel-producing operations in the country at its peak. The plant has operated at reduced capacity following major cutbacks in the 2010s.
Alton (population ~26,000) occupies dramatic Mississippi River bluffs – a historic city with significant Civil War and abolitionist history. Elijah P. Lovejoy, the abolitionist newspaper editor murdered by a pro-slavery mob in 1837, was martyred in Alton in an event that galvanized the abolitionist movement. The Lewis and Clark State Historic Site at Camp River Dubois marks the winter camp where Lewis and Clark prepared for their 1804 expedition. The Alton Belle Casino operated for years on the river before closing.
Collinsville (population ~26,000) is home to the Cahokia Mounds State Historic Site – a UNESCO World Heritage Site (one of only 24 in the United States) preserving the remnants of Cahokia, a pre-Columbian Native American city that at its peak around 1100 CE was larger than London, with a population of 10,000–20,000 people. Monks Mound – the largest pre-Columbian earthwork in North America – rises 100 feet above the surrounding floodplain. Cahokia is arguably the most significant archaeological site in the United States.
All Services
Browse every category and topic available for this county.
Illinois assesses at 33.33% of fair market value with township assessors. Illinois property taxes are among the highest effective rates nationally.
The appeal process: File with the Madison County Board of Review at 157 N. Main Street, Edwardsville, IL 62025, phone 618-296-6200. Appeal timing varies by township – generally summer/fall after assessment notices. If dissatisfied, appeal to the Illinois Property Tax Appeal Board (PTAB).
IL estate tax: Above $4 million at rates up to 16%. No IL inheritance tax.
OWNWELL CTA: Madison County Board of Review – timing varies by township. Edwardsville and Glen Carbon St. Louis metro appreciation consistent. IL estate tax above $4M. No IL inheritance tax. Ownwell manages the appeal with no upfront cost.
Recommended
Madison County Board of Review - timing varies by township. Edwardsville and Glen Carbon St. Louis metro appreciation consistent. IL estate tax above $4M. No IL inheritance tax. Ownwell manages the appeal with no upfront cost.
Courts & Legal
Courts & Legal
Circuit Court (Probate): The Madison County Circuit Court – 3rd Judicial Circuit at 155 N. Main Street, Edwardsville, IL 62025, phone 618-692-6240, handles probate, estate administration, and all civil and criminal matters.
Recorder of Deeds: The Madison County Recorder at 157 N. Main Street maintains real property records. Land records searchable online.
Senior Services
The Madison County Community Development, Senior Services and the Area Agency on Aging Southwestern Illinois at 2365 Country Road, Granite City, IL 62040, phone 618-222-2561, serve the county’s senior population with in-home services, caregiver support, nutrition programs, and transportation. OSF HealthCare and Gateway Regional Medical Center provide healthcare across the county.
Recommended
Assisted living, memory care, and independent living across Madison County - from Edwardsville and Collinsville to Granite City, Alton, and the Mississippi River communities.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
COUNTY CLERK (Records, Vital Records, Elections)
157 N. Main St., Edwardsville, IL 62025
(618) 692-6290
CIRCUIT CLERK (Court Records, Marriage Licenses)
155 N. Main St., Edwardsville, IL 62025
(618) 692-7040
ELECTIONS (County Clerk)
157 N. Main St., Edwardsville, IL 62025
(618) 692-6290
Genealogy
County-level record sources
Madison County Circuit Clerk (probate/estate case files – see Probate section above).
Local societies
No dedicated Madison County genealogical society was confirmed in available directories.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Where to go
Madison County Circuit Clerk Madison County Courthouse, 155 North Main Street, Edwardsville, IL 62025 (618) 692-6240
Madison County is part of the Metro-East region across the Mississippi River from St. Louis, Missouri – one of Illinois’ most populous counties. A Criminal Justice Center (509 Ramey Street) and an Alton satellite office (1700 E. Broadway, open Tuesday/Friday only) supplement the main courthouse.
Step 1: figure out which path applies
Illinois has NOT adopted the Uniform Probate Code and is not a community property state – it follows common law property principles. Illinois probate is governed by the Probate Act of 1975 (755 ILCS 5/). Two main paths:
Small Estate Affidavit – for estates where personal property (excluding real estate) is valued at $150,000 or less (raised from $100,000 effective August 15, 2025), with no unresolved debts or claims and no real estate involved. No formal court probate is required.
Formal Probate (Independent or Supervised Administration) – required when the estate doesn’t qualify for the small estate affidavit. Most Illinois probate cases proceed under Independent Administration, letting the estate representative act without prior court approval for most routine actions.
Step 2: filing for formal probate
File the decedent’s original will (if one exists) with the Madison County Circuit Clerk, where the decedent resided at death.
Petition the court to open the estate and appoint an executor (if there’s a will) or an administrator (if intestate).
The court issues Letters of Office (Letters Testamentary or Letters of Administration) appointing the representative.
Publish notice to creditors and unknown heirs as required by Illinois law.
Under Independent Administration, the representative marshals assets, pays valid debts and taxes, and distributes the remaining estate without needing court approval for each step.
File a final accounting or closing documents to formally close the estate.
What it costs
Illinois imposes its own state estate tax on estates valued above $4 million, with rates up to 16%. There is no Illinois inheritance tax.
Filing fees vary by county – confirm current amounts with the Madison County Circuit Clerk.
Most uncontested probate proceedings in Illinois can be completed within about a year.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
405 Randle St., Edwardsville, IL 62025
(618) 692-4433
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
COUNTY CLERK (Records, Vital Records, Elections)
157 N. Main St., Edwardsville, IL 62025
(618) 692-6290
ELECTIONS (County Clerk)
157 N. Main St., Edwardsville, IL 62025
(618) 692-6290
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Madison County Health Dept
(618) 692-8954
IL DCFS — Granite City
(618) 877-6378
IL Medicaid
(800) 843-6154
Anderson Hospital (Maryville)
andersonhospital.org
Gateway Regional Medical Center (Granite City)
gatewayregional.net
Alton Memorial Hospital
altonmemorial.org
HSHS St. Joseph's (Highland)
hshs.org/st-josephs-highland
Public Health Information
PUBLIC HEALTH
Office: Madison County Health Department – confirm current contact via madisoncountyil.gov.
Editorial independence: CountyOffices maintains strict editorial independence from our affiliate partners. Our content is researched from official government sources. Affiliate relationships do not influence our recommendations or the information we publish.
Recommended for Illinois
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