Ripa is the 12th rione of Rome, Italy, identified by the initials R. XII, and it is located in the Municipio I.

The borough has always been urbanized, although not intensively, since the Ancient Rome: at that time, the area included three regiones, Circus Maximus, Piscina Publica and Aventinus.

During the Middle Ages, the northern part of the rione remained unpopulated, with the only exceptions of some fortified monastery and a baronial castle, the Rocca Savella.

Initially the rione was ampler and included other portions of the city, that were detached in 1921 in order to establish two more rioni, San Saba and Testaccio.

Eastward, the rione shares a short border with Celio (R. XIX), from which is separated by Piazza di Porta Capena.