The Era is a river in Tuscany in Italy. It rises near Volterra and flows into the Arno river at Pontedera.

The Era is 54 km long, and its main tributaries are: (to the left) Cascina river, Ragone torrent, Sterza torrent, and (to the right) Capriggine torrent and Roglio torrent.

In 1966 the river flooded the town of Pontedera.