BlackRock Municipal Income Fund, Inc., formerly BlackRock Muni Intermediate Duration Fund, Inc., is a closed-end management investment company. The Fund's investment objective is to provide common shareholders with high current income exempt from federal income taxes. The Fund seeks to achieve its investment objective by investing approximately 80% of its assets in municipal bonds exempt from federal income taxes (except that the interest may be subject to the federal alternative minimum tax). Under normal market conditions, the Fund invests approximately 80& of its assets in municipal bonds rated investment grade and invests over 80% of its assets in municipal bonds with a duration of 3 to 10 years at the time of investment. The Fund invests in a range of sectors, including transportation, health, state, utilities, county/city/special district/school district, corporate, education, tobacco and housing. BlackRock Advisors, LLC is an investment advisor of the Fund.