The South Meetinghouse is a historic ward hall at 260 Marcy Street (corner of Meeting House Hill) in Portsmouth, New Hampshire.

The South Meetinghouse is located in Portsmouth's southern residential area, at the northwest corner of Marcy Street and Meeting House Hill.

Italianate stylistic elements of the exterior include round-headed windows, and a bracketed roof at the top of its two-stage tower.

The main entrance is sheltered by a Greek Revival four-column porch with Doric columns and an Ionic entablature, which extends the width of the front facade.

The ground floor is divided into two spaces, with paired iron columns supporting the ceiling and upper level, which has a single large high-ceilinged chamber.