Gennaro (disambiguation)

Gennaro (from the Latin Januarius, meaning "devoted to Janus") may refer to
 * San Gennaro, people and places named for the saint, bishop of Naples
 * Gennaro (given name)
 * Gennaro (surname)
 * DiGennaro Communications, American communications company
 * The Grand Gennaro, a novel by Garibaldi M. Lapolla