A mortgage interest rate is the rate of interest charged on a mortgage. Mortgage interest rates can be either fixed or variable. The rates tend to rise or fall with the interest rate and can greatly affect the housing market. Our Mortgage Interest Rates page displays historical mortgage interest rate data, as well as mortgage interest related news. Charts are provided for 30 Year Fixed, 15 Year Fixed, 5/1 Year Arm, and 30 Year Jumbo rates.