Eaton Elementary School, Historic elementary school in Hattiesburg, United States.

Eaton Elementary School is a two-story brick building at 1105 McInnis Avenue, built in 1905 with a 12-bay front facade of round-arch window frames and a hip roof. A stucco finish covers the brick walls, and a steel fire escape is mounted at the west end of the front facade. Each floor held four classrooms off a central hallway, with beadboard wainscoting and ceilings.

The school was erected in 1905 and served its community for over eight decades before operations ceased in the late 1980s. In 2008, the building earned designation as a place listed on the National Register of Historic Places.

The school's name comes from George Eaton, an early settler who gave the land for the building. It was also known as Third Ward School, and the 1905 building kept its Romanesque Revival form intact for over a century, which the Mississippi Department of Archives and History cites as rare among Mississippi schools.

The building stands at 1105 McInnis Ave. Its west elevation was altered in 1949 by a one-story cafeteria addition, and a 1957 auditorium was attached to that stage. After the roof work of 2009–2010, part of the second floor collapsed; two-ton concrete anchors and cables now brace the exterior walls, and only the walls remain visible.

The 1905 building is one of the few early-20th-century Romanesque Revival schoolhouses in Mississippi still standing with its original form, according to the Mississippi Department of Archives and History. A steel fire escape is bolted to the west end of the front facade, and a metal door in the centre second-floor window of the east elevation opens onto another.