Gera or Yera (Greek: Γέρα) is a town on the Aegean island of Lesbos in Greece.

According to scholars the ancient name may have been Portus Hieraeus; Pliny the Elder mentions a Lesbian city called Hiera, which was abandoned before his time.

[2] The 1st-century Roman historian and naturalist Pliny the Elder recorded the existence of an ancient city on Lesbos known as Hiera.

[3][4] The Municipality of Gera was established with the Kapodistrias reform in 1997, with the capital at Pappados,[5] covering a surface of 86.350 km2 (33.340 sq mi)[6] and with a population of 5,592 in the 2021 census.

The name has changed throughout history, and has been variously called Ieremidia, Gieremia, Geremia, Lichremadia, Maliae, Iero, Hiera, Giera, Keramia, Iera, Gera, Eleon, Olivier.