During the fourth quarter of 2025, Oswego homeowners paid property taxes at 2.3% of their homes’ value—more than 2.6 times above the national average, according to BlockShopper.com.
Oswego’s median home sale price reached $388,000 for the quarter, with data reflecting 88 homes changing hands in that period. For 2025, the community saw a median tax bill of $8,863, equaling 2.3% of the median assessed home value.
The 2024 U.S. average effective property tax rate was 0.888%.
Aurora and Yorkville had the two highest tax rates among cities in Kendall County.
The article’s calculation for Oswego’s 2025 effective property tax rate uses county-reported 2023 tax data and applies estimated inflation factors; the actual rate may differ slightly in practice.
National median home values rose in 2025, reaching around $447,000 in June. This marks a 1.13% year-over-year increase, according to Redfin. Data also indicate a marked supply-demand imbalance: there were 36% more sellers than buyers, with an excess of 508,715 homes. Redfin identifies housing markets as balanced if sellers and buyers are within 10% of each other.
The following table displays a comparison of Aurora and other cities in Kendall County by median effective property tax rate, calculated from Q4 2025 sales and tax data.
| City | Q4 2025 Sales | Q4 2025 Median Price | Median tax 2025 | Effective tax rate |
|---|---|---|---|---|
| Aurora | 12 | $306,700 | $10,265 | 3.3% |
| Yorkville | 64 | $332,500 | $8,750 | 2.6% |
| Plano | 39 | $261,500 | $6,521 | 2.5% |
| Bristol | 3 | $280,000 | $7,081 | 2.5% |
| Oswego | 88 | $388,000 | $8,863 | 2.3% |
| Montgomery | 19 | $380,000 | $8,785 | 2.3% |
| Joliet | 18 | $370,500 | $8,099 | 2.2% |
| Boulder Hill | 30 | $284,500 | $6,027 | 2.1% |
| Plainfield | 5 | $660,000 | $14,093 | 2.1% |
| Newark | 10 | $378,750 | $6,665 | 1.8% |
| Minooka | 8 | $725,000 | $8,096 | 1.1% |
