Municipal bonds are bonds issued by an American county, city, publicly owned airport, seaport, school district, or utility. The bonds are issued to improve the said cities or counties, or are tied specifically to a project within a county or city. Therefore, the bonds are backed by the county, city, or specific project. One general aspect of municipal bonds that makes them attractive is that they provide income with great tax benefits. Usually, municipal bonds are completely exempt from federal taxes. Municipal bonds trade in the bond markets, much like most of the other major bonds in the U.S.