Montgomery County, IL Property Tax: $1,758/yr (2026)
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The effective property tax rate in Montgomery County is 1.72% of assessed home value. On a home at the county median value of $102,200, that works out to about $1,758 per year, or $147 per month. Montgomery County is located in central Illinois, and is home to approximately 28,078 residents.
About Montgomery County
Montgomery County covers approximately 703.8 square miles in Illinois. The county is home to about 28,078 residents living in roughly 12,528 housing units, of which 68.6% are owner-occupied. The median household income is $61,863, and the median home was built in 1963.
Montgomery County borders Bond County, Christian County, Fayette County, Macoupin County, Madison County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Illinois
Property taxes in Illinois are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Illinois offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Montgomery County Assessor's office to learn which exemptions apply to your property and when to file.
Montgomery County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Montgomery County, IL | 1.72% | $102,200 | $1,758 |
| Illinois state average | 1.83% | — | $1,870* |
| Bond County | 1.96% | $133,100 | $2,612 |
| Christian County | 1.69% | $112,100 | $1,896 |
| Fayette County | 1.52% | $114,700 | $1,740 |
| Macoupin County | 1.58% | $126,100 | $1,990 |
| Madison County | 1.92% | $167,900 | $3,232 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Montgomery County's median home value of $102,200. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Montgomery County's property tax rate compare to the rest of Illinois?
At 1.72%, Montgomery County is lower than the Illinois state average of 1.83%. On a home at the county median of $102,200, that means about $1,758 per year — versus $1,870 at the state average rate, a difference of $112 per year. Compared to the national average of 1.10%, Montgomery County is above average.
What's a typical annual property tax bill in Montgomery County?
For a home at the county median value of $102,200, the annual property tax in Montgomery County is approximately $1,758 — or about $147 per month. For a home worth $153,300, expect around $2,637 per year. For a $204,400 home, approximately $3,516 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Montgomery County property tax assessment?
Property assessment appeals in Montgomery County are handled by the Montgomery County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Montgomery County?
Illinois counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 1.72% shown here. Contact the Montgomery County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File