Property Tax in Sangamon County, Illinois

What the Sangamon County numbers mean

The median is the midpoint of the county's actual bills: half of Sangamon County homeowners pay more than $3,369 a year and half pay less. The exact bill for any one home depends on its assessed value, exemptions, and which school, municipal and special districts cover it.

Set against the median home value of $170,300, the median bill works out to a derived effective rate of 1.98%. That rate is an estimate computed from the two medians — no county publishes a rate calculated this way — but it adjusts for home prices, which makes comparisons between counties more meaningful.

The key figures for Sangamon County

For context, the Illinois medians are $5,189 of tax on $250,500 of value, and the US medians are $2,969 on $303,400. *Derived figures are estimates from Census medians, not official rates.

Sangamon County at a glance

• Median tax rank in Illinois: #23 of 102 counties
• Median home value rank in Illinois: #23 of 102
• Population rank in Illinois: #11 of 102 (195,217 residents)
• Population density rank: #13 of 102 (225 people per square mile)
• Land area rank in Illinois: #9 of 102 (868 sq mi, 1.6% of the combined county land area)
• Median tax as a monthly figure: $281; per $1,000 of home value: $1.98

How Sangamon County compares

Of the 102 Illinois counties with published data, 22 have a higher median property tax bill than Sangamon County's $3,369, putting the county at #23 in the state. Its bill is about 35% lower than the state median of $5,189 and about 13% higher than the national median of $2,969.

Rates and values pull in opposite directions: an expensive housing market can produce big bills at ordinary rates. Here the derived rate is 1.98%, versus 0.98% derived nationally, and the median home value ranks #23 within Illinois.

Some extra context for Sangamon County: the median bill works out to about $281 a month, and the derived rate equals roughly $1,978 of tax per $100,000 of home value. The county is home to 195,217 people — the #11 most populous county in Illinois, spread over 868 square miles, a density of about 225 people per square mile. Its median home value, $170,300, ranks #23 among the state's 102 counties with data.

Nationally, Sangamon County's median bill of $3,369 ranks #347 of 3133 counties with published data — inside the top 11% of counties by tax paid. The county accounts for about 1.5% of Illinois's population, its median home value is about 32% below the state median, and at the derived rate the median home would hand over roughly 19.78% of its value in tax across a decade. Within the state, the distance from Sangamon County to the most expensive county, Lake County ($8,743), is $5,374 a year.

Counties nearest Sangamon County in the Illinois ranking

Sangamon County and its population peers

Population is a useful lens on these figures, so the table below sets Sangamon County beside the counties closest to it in population anywhere in the country — communities of a similar scale operating under different state and local tax systems. Ranked by median tax paid within this peer group of 9, Sangamon County's $3,369 bill is #4 of 9.

The closest population match is Livingston County, Michigan (195,143 residents), where the median real estate tax paid is $3,269 on a median home value of $331,100 — $100 more than Sangamon County pays.

Sangamon County's nearest population neighbours within Illinois are St. Clair County (254,777 residents, median tax $3,533 on a median value of $168,800); Champaign County (206,098 residents, median tax $4,245 on a median value of $205,100); Peoria County (179,831 residents, median tax $3,416 on a median value of $152,600); McLean County (170,882 residents, median tax $4,503 on a median value of $198,300). Comparing them is a reminder that even inside one state's rules, the bill follows local home values and local district rates more than anything decided at the state level.

How the tax is worked out

Think of the final bill as three ingredients: the assessed value of the property, the exemptions subtracted from it, and the combined rate of every district the property sits in. Sangamon County's medians imply a derived rate of 1.98%; applied illustratively, a $400,000 home would owe about $7,912 a year, or around $659 a month spread evenly. Individual properties depart from the illustration in both directions.

Illustrative bills in Sangamon County at the derived rate

The derived rate of 1.98% is only an estimate built from medians, but applying it to different home values gives a sense of scale for Sangamon County — and a quick way to compare with the state derived rate of 2.07% and the US figure of 0.98%:

Illustration only: real bills are computed from the assessed value, exemptions, and the combined rates of the property's actual taxing districts.

Checking your assessment in Sangamon County

Most successful appeals are won on facts, not arguments. Start with the property record card held by the Sangamon County assessor: wrong square footage, an extra room, or a missing homestead exemption are common and fixable. Next, line your assessed value up against recent sales of genuinely similar homes nearby. Many disputes end at an informal conversation with the assessor's office; if yours does not, file the formal appeal with the review board named on your notice before its deadline, evidence attached, and keep paying the bill in the meantime so penalties do not build up.

More Illinois counties

• Champaign County, IL — $4,245
• Peoria County, IL — $3,416
• McLean County, IL — $4,503
• Rock Island County, IL — $3,372
• St. Clair County, IL — $3,533
• Kendall County, IL — $7,556

Frequently asked questions