The Marissa Academy is a historic school building located at 610 S. Main St. in Marissa, Illinois. The building was built in 1891 for the Marissa Academy, a college preparatory academy which had graduated its first class two years prior. The private school was the first college preparatory school in the area. Graduating students at the academy could enroll at Monmouth College without taking a qualifying examination under a special arrangement. In 1900, the academy closed after a public high school opened in Marissa. The building has since been used as a meeting hall for community groups and as additional space for Marissa's elementary school. It is now the headquarters of the Marissa Historical and Genealogical Society.