How much is a 1864 100 dollar savings bond worth?

The value of a 1864 $100 savings bond depends on several factors, including its interest rate, whether it has been redeemed, and its condition. If it is a savings bond from the U.S. government, it may have accrued a significant amount of interest over the years. To determine its current worth, you would need to check with the U.S. Department of the Treasury or a financial institution that handles savings bonds. Generally, these bonds can also be affected by historical significance and collector interest.