Property tax in Sangamon County, Illinois
In Sangamon County, the property tax bill comes from the Sangamon County Treasurer. Every due date for the 2025 Payable 2026 bill has passed, and the county had not posted the next cycle's dates when we checked. You can look up and pay the bill on the county's own payment page. Taken from Sangamon County's own pages, checked September 23, 2026.
The median property tax bill in Sangamon County, Illinois is $3,512 a year, which is about 1.99% of the county's median home value of $176,300. That effective rate is higher than the typical Illinois county (1.81%) and higher than the national median (0.81%). These are American Community Survey 5-year estimates (2024); your own bill depends on your home's assessed value and any exemptions.
Who sends the property tax bill in Sangamon County, and how do you pay it?
The bill comes from the Sangamon County Treasurer. The value it is based on is set by a separate office, the Sangamon County Supervisor of Assessments, with the township assessors, which is who to ask if the value looks wrong. For how to look up and pay the bill, go to the county's own payment information.
Township assessors value homes, and the Board of Review hears complaints about assessments; the Supervisor of Assessments serves as its clerk. The exemptions and the senior tax deferral listed on the county's pages are the state's programs, applied for through the county. E-check payments online are free; card payments, online or by phone, go through a separate payment processor that charges a convenience fee. The Treasurer takes prepayments of next year's taxes starting in late November. Mobile homes get a separate tax bill: for 2026 it was mailed May 8 and due September 4, and the last day to pay it is also November 5.
When are property taxes due in Sangamon County?
Every due date for the 2025 Payable 2026 bill has passed, and Sangamon County had not posted the next cycle's dates when we checked on September 23, 2026. If that bill is still unpaid, the late-payment rules below apply to it. Counties usually repeat the schedule, but confirm the new dates on your next bill. For the 2025 Payable 2026 bill, Sangamon County splits the bill into 2 payments, the first due June 5, 2026 and the last September 4, 2026. Illinois law charges interest of 1.5% a month, or part of a month, on late payments, starting June 6 on the first installment and September 5 on the second. Online, phone and INB bank payments are taken through November 4, 2026 at 5:00 p.m. The last day to pay is Thursday, November 5, 2026, by 5:00 p.m. at the Treasurer's office in the County Building, and payments that day are cash or check only. The tax sale is set for November 6, 2026.
| Payment | Due | Note |
|---|---|---|
| First installment | June 5, 2026 (passed) | A mailed payment is on time if it is postmarked by the due date. |
| Second installment | September 4, 2026 (passed) | INB bank branches take payments at the drive-thru and lobby through November 4, 2026; bring the payment stub from your bill. |
From Sangamon County's published schedule, checked September 23, 2026. If a date falls on a weekend or holiday, the county's own rules on the next business day apply.
Estimate the property tax on a home in Sangamon County
Enter a home's market value for a ballpark at Sangamon County's average effective rate of 1.99% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.
Estimated property tax: $3,508 / year
Property tax in Sangamon County at a glance
| Measure | Value |
|---|---|
| Median annual property tax | $3,512 |
| Median home value | $176,300 |
| Effective tax rate | 1.99% |
| Typical Illinois county rate | 1.81% |
| National median county rate | 0.81% |
Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.
How does Sangamon County compare in Illinois?
Among Illinois's 102 counties, Sangamon County has the 33rd highest effective property-tax rate: 32 rank higher and 69 rank lower. That is on the higher side for Illinois. Nationally, it ranks 93rd of 3135 US counties by effective rate. See every Illinois county ranked.
How much do homeowners in Sangamon County actually pay?
The median is only the middle bill. Across Sangamon County's 60,443 owner-occupied homes, 56.1% pay $3,000 or more a year in property tax, 72.8% pay at least $2,000, and 7% pay under $800. Another 2.4% report paying no property tax at all, which usually means an exemption covers the whole bill.
| Annual bill | Homes | Share |
|---|---|---|
| Under $800 | 4,215 | 7% |
| $800 to $1,499 | 5,559 | 9.2% |
| $1,500 to $1,999 | 5,228 | 8.6% |
| $2,000 to $2,999 | 10,080 | 16.7% |
| $3,000 or more | 33,930 | 56.1% |
| No property tax paid | 1,431 | 2.4% |
Owners with a mortgage pay a median of $3,786 and owners without one pay $3,121. Owners who have paid off a home have usually held it longer, and in states that cap how fast an existing owner's assessment can rise, long-held homes carry lower assessed values. Census table B25103.
How does the Sangamon County property tax bill compare with local incomes?
The median property tax bill of $3,512 is about 3.7% of the median income of Sangamon County homeowner households, $94,873 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 71.3% of Sangamon County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.
Have property taxes gone up in Sangamon County?
Yes. The median bill went from $2,869 in 2015-2019 to $3,512 in 2020-2024, a 22.4% rise. Over the same span the median home value moved 24.9%, from $141,200 to $176,300.
Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.
Property tax in counties next to Sangamon County
Sangamon County borders 8 counties.
| County | Effective rate | Median bill | Median home value |
|---|---|---|---|
| Macon County, IL | 2.12% | $2,696 | $127,300 |
| Cass County, IL | 2.02% | $1,958 | $97,100 |
| Sangamon County, IL (this county) | 1.99% | $3,512 | $176,300 |
| Logan County, IL | 1.77% | $2,385 | $134,400 |
| Morgan County, IL | 1.76% | $2,306 | $130,800 |
| Menard County, IL | 1.72% | $3,190 | $185,500 |
| Montgomery County, IL | 1.68% | $1,887 | $112,300 |
| Christian County, IL | 1.64% | $1,891 | $115,500 |
| Macoupin County, IL | 1.5% | $2,073 | $138,200 |
How is a home assessed in Sangamon County?
Illinois assesses homes at 33.33% of market value in every county, Sangamon County included. How Illinois assesses and reappraises homes.
Is there a homestead exemption in Sangamon County?
Yes. Illinois's General Homestead Exemption is $6,000 of equalized assessed value in most counties, $8,000 in counties next to Cook, and $10,000 in Cook County. That is the Illinois rule, and it applies in Sangamon County. Illinois's exemptions and relief programs in full.
Sangamon County does not add relief programs of its own beyond the Illinois ones (checked September 23, 2026).
How to appeal your Sangamon County property assessment
In Sangamon County you appeal to the Sangamon County Board of Review. The deadline: Within 30 days after your township's assessment changes are published in the newspaper (state law). For 2026, the deadline for Capital Township was September 8, and for Gardner, Loami and Maxwell townships it is November 9, 2026. Deadlines for the other townships had not been posted as of September 23, 2026. File an assessment complaint with the Board of Review; a complaint mailed by U.S. Postal Service counts as filed on its postmark date. How to file. Checked September 23, 2026 against the official appeal rules.
How Illinois's appeal process works, including the next level if the first one turns you down.
Illinois rules from primary state sources, reviewed September 7, 2026; sources on the Illinois page.
Work out your own numbers
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How much house can I afford?
Your income, debts and down payment against the 28/36 rule lenders actually use, with Sangamon County's tax rate to hand.
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Mortgage calculator
Monthly payment with principal, interest, tax and insurance, plus what an extra payment saves you.
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Illinois income tax
Brackets, standard deduction and what Illinois actually taxes.
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Sales tax in Sangamon County
The other local tax: combined state and local rate for this county.
Sources
- Median real estate taxes paid and median home value for Sangamon County, Illinois: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103, B25077, B25102, B25119 and B25003; the five-year comparison uses the 2015-2019 estimates. Neighboring counties: Census county adjacency file.