Eaton Vance Ohio Municipal Income Trust operates as nondiversified, closed-end management investment company. The trust invests primarily in debt securities issued by Ohio municipalities. Its portfolio comprises investments primarily in cogeneration, education, electric utilities, general obligations, hospital, industrial development, transportation, and water and sewer sectors. Eaton Vance Management serves as the investment adviser of the trust. Eaton Vance Ohio Municipal Income Trust was organized in 1998 and is based in Boston, Massachusetts.