Innocenzo Spinazzi (1726–1798) was an Italian sculptor of the Rococo period active in Rome and Florence.
Born in Rome the son of a silversmith, he became the leading sculptor in Florence, where he died.
He arrived in Florence in 1769, and the next year was named official court sculptor for the Lorraine dynasty in 1770.
In 1792 he added an angel to the Baptism by Andrea Sansovino and Vincenzo Danti above the Porta del Paradiso of the Baptistery of Florence.
His virtuoso marble figures of heavily veiled women, for example Faith (1781; Santa Maria Maddalena de' Pazzi) and Religion (from the tomb of Varvara Jakovlevna, Princess Beloselskij, 1794; Turin, Museo Civico), follow precedents set by Antonio Corradini and Giuseppe Sanmartino in the Capella Sansevero of Naples.