As of 2023, the state with the highest property tax rates in the United States is New Jersey. According to data from the Tax Foundation, New Jersey has an effective property tax rate of 2.44%, which is more than double the national average of 1.07%. Other states with high property tax rates include Illinois, New Hampshire, Connecticut, and Wisconsin. However, it’s important to note that property tax rates can vary widely within a state, and can be influenced by factors such as local government spending and property values.