Lemont effective property tax rate climbs to 1.9% in 2025, up from 1.8% in 2016

Lemont’s effective property tax rate went from 1.8% in 2016 to 1.9% in 2025, rising 0.1 percentage points over 10 years, BlockShopper.com reported.

The average effective property tax rate in Cook County was 2% in 2025, consistent with the rate recorded in 2016. Lemont’s rate in 2025 was lower than the overall county average.

Lemont experienced the 13th largest increase in effective property tax rates among the 136 Cook County cities included in the analysis over those years.

In 2025, Lemont placed 107th in Cook County for its current effective property tax rate of 1.9% when compared with other cities in the area.

This level is 2.1 times greater than the average effective property tax rate of 0.888% observed across the U.S. in 2024.

U.S. home prices kept increasing into 2025, reaching a national median of about $447,000 in June, according to Redfin data, a 1.13% increase year-over-year. The same data reflects a wide gap between supply and demand, with 36% more sellers than buyers—a difference of 508,715 homes. Under Redfin’s definition, a balanced market has a buyer-to-seller gap of 10% or less.

Even with steady or declining property tax rates, homeowners can see higher tax bills when property values rise. Because tax bills depend on both the rate and the home’s assessed value, increasing property values can mean higher overall taxes even when rates decrease or stay put. In fact, a Lincoln Institute of Land Policy analysis found that, from 2023 to 2024, the average effective property tax rate on a median-priced home in each state’s largest city dropped by more than 5%.

At the same time, increased property values have expanded tax bases in many places. Since property taxes are linked to market values, rising home prices can result in larger tax bills even where effective rates do not rise. Studies also show that a 1% increase in a region’s median home value correlates with about a 0.71% drop in the effective tax rate, indicating robust home price growth can allow for lower rates while still growing revenue.