Nuveen Municipal Income Fund, Inc. (the Fund) is a closed-end investment company. The Fund's primary investment objective is to provide current income exempt from regular federal income tax by investing primarily in a portfolio of municipal obligations issued by state and local government authorities or certain United States territories. The fund invests at least 80% of its managed assets in municipal securities rated investment grade (Baa/BBB or better by S&P, Moody's, or Fitch) at the time of investment, or, if they are unrated, are judged by the manager to be of comparable quality. The Fund invests in sectors, such as healthcare, tax obligation/limited, US guaranteed, transportation, tax Obligation/General, Consumer Staples and utilities. Nuveen Fund Advisors, Inc. is the Fund manager.