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Illinois · Chicago Western Collar · Fox River Valley · #120 Most Populous County in the US
Kane County, Illinois
Chicago's western collar - Aurora, Elgin, and the Fox River communities anchor Illinois's fifth-largest county. A county that is simultaneously suburban Chicago and distinct Fox Valley culture, with one of Illinois's fastest-growing industrial corridors. Property tax, courts, public records, probate, and senior services for Kane County residents.
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
What do you need to do?
Tell us your goal and we'll guide you step-by-step to the right office, forms, and official resources.
Kane 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: Kane County Sheriff’s Office – 37W755 Illinois Route 38, St. Charles, IL 60175 | Jail (630) 232-6840. The Sheriff’s Office provides countywide leadership on murder investigations, fatal traffic accidents, SWAT, bomb squad, and canine unit services, alongside court and courthouse security.
Notes: For an active emergency, call 911. Kane County is the fifth-most populous county in Illinois (516,522 residents as of 2020), including the cities of Aurora, Elgin, St. Charles, Geneva, Batavia, and Carpentersville.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: I-88/90 and US-20/30 serve Geneva, the county seat; Aurora is the county’s largest city.
Notes: Kane County was formed January 16, 1836, named for Elias Kent Kane, a pioneer lawyer, territorial judge, prominent member of Illinois’s 1818 Constitutional Convention, the state’s first Secretary of State, and later a U.S. Senator.
Business & Permits
BUILDING & PERMITS
Office: Kane County Courthouse – 100 S. Third Street, Geneva, IL | (630) 232-3400. Kane County Judicial Center – 37W777 Route 38, Suite 160, St. Charles, IL | (630) 232-3413. Kane County Government Center – 719 S. Batavia Avenue, Geneva, IL | (630) 232-5950 (County Clerk) / (630) 232-5935 (Recorder). Hours: Mon-Fri 8:30 AM-4:30 PM.
Notes: The Fabyan Windmill in Geneva, a preserved historic structure, is listed on the National Register of Historic Places.
Veterans Services
VETERANS SERVICES
Office: Kane County Veterans Assistance Commission – confirm current contact via countyofkane.org.
Libraries
LIBRARIES
Geneva Public Library / Aurora Public Library (multiple locations) – confirm current addresses/phones via the county library system.
Parks & Recreation
PARKS & RECREATION
Key Assets: The Fabyan Windmill and adjacent Fabyan Forest Preserve, the Fox River corridor running through the county, and the historic downtowns of Geneva, St. Charles, and Batavia are the county’s premier heritage and recreational attractions.
Notes: Kane County’s large population and extensive Fox River Valley communities make it one of the most developed suburban Chicago counties covered in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Kane County Assessment Office – confirm current contact via countyofkane.org.
Animal Services
ANIMAL SERVICES
Kane County Animal Control – confirm current contact via countyofkane.org.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Kane County Division of Environmental and Water Resources – confirm current contact via countyofkane.org.
NOTES: Kane County is the forty-fifth county completed in Illinois’s Round 3 v2 redo, under the A+ sourced standard established for this project. Kane County’s status as Illinois’s fifth-most populous county, encompassing the Fox River Valley’s major cities, is among the standout local facts covered in this project. 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 Kane County
Kane County is Chicago’s Fox River valley western collar county – the chain of historic Fox River mill cities from Elgin through Geneva to Aurora and the Art Deco Paramount Theatre define a suburban county whose historic river corridor communities and rapid growth make it one of the Chicago region’s most dynamic and historically rich suburban areas.
Geneva (the county seat, population ~22,000) is Kane County’s governmental hub on the Fox River, a historic western suburb whose courthouse, riverfront, and Tri-Cities character anchor the county’s governmental center while Aurora (population ~180,000) serves as the county’s most populous city.
All Services
Browse every category and topic available for this county.
Kane County Supervisor of Assessments at 719 S. Batavia Avenue, Geneva, IL 60134, phone 630-208-3818. IL assessed at 33.33% of market value.
Recommended
Kane County's appeal window is township-specific - typically 30 days from published township roll notice. Know your township. Senior Freeze income limit rises to $75,000 for 2026 - if you were previously over the limit, reapply. Illinois estate tax above $4M at up to 16% makes planning important even for moderate estates with appreciated real estate. Ownwell manages the Board of Review appeal with no upfront cost.
Courts & Legal
Kane County Circuit Court at 100 S. 3rd Street, Geneva, IL 60134, phone 630-232-3413, handles probate.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
COUNTY CLERK (Records, Vital Records, Elections)
719 S. Batavia Ave., Geneva, IL 60134
(630) 232-5990
CIRCUIT CLERK (Court Records, Marriage Licenses)
100 S. 3rd St., Geneva, IL 60134
(630) 232-3413
ELECTIONS (County Clerk)
719 S. Batavia Ave., Geneva, IL 60134
(630) 232-5990
Genealogy
County-level record sources
Kane County Circuit Clerk (probate/estate case files – see Probate section above).
The Fabyan Windmill in Geneva (National Register of Historic Places) is a notable local historical landmark.
Local societies
No dedicated Kane 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
Kane County Circuit Clerk (16th Judicial Circuit) 540 South Randall Road, St. Charles, IL 60174 (630) 232-3413
Kane County is Illinois’ 5th-most-populous county, part of the Chicago metro area, with the county seat in Geneva and the largest city Aurora. Kane County is one of only 7 single-county judicial circuits in Illinois.
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 Kane 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 Kane 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
37W755 IL Route 38, St. Charles, IL 60175
(630) 232-8400
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
COUNTY CLERK (Records, Vital Records, Elections)
719 S. Batavia Ave., Geneva, IL 60134
(630) 232-5990
ELECTIONS (County Clerk)
719 S. Batavia Ave., Geneva, IL 60134
(630) 232-5990
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Kane County Health Dept
(630) 208-3801
IL DCFS — Aurora
(630) 844-5100
IL Medicaid
(800) 843-6154
Northwestern Medicine Delnor Hospital (Geneva)
nm.org/delnor
Rush Copley Medical Center (Aurora)
rushcopley.com
Advocate Sherman Hospital (Elgin)
advocatehealth.com/sherman
Northwestern Medicine Valley West Hospital (Sandwich)
nm.org/valley-west
Public Health Information
PUBLIC HEALTH
Office: Kane County Health Department – confirm current contact via countyofkane.org.
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Recommended for Illinois
Ownwell
Property tax appeal service. Contingency fee - no savings, no charge.
