Cerenzia is a town, comune (municipality), former bishopric and Latin titular see with a population of 1000 people in the province of Crotone, in Calabria region, southernmost peninsular Italy.

The modern town is besides the Ancient settlement Acerenthia, now a rural site known as Cerenzia vecchia ('old C.'), which includes the ruins of the cathedral dedicated to Saint Theodorus of Amasea, all abandoned to peasantry by the second half of the Ottocento (19th century).

The bishoprics rich gifts and possessions aroused greed among the local barons, especially Marchisorto, count of Crotone Stefano, tried to impose in 1205 his chaplain, Madio, instead of legitimate bishop Guglielmo, elected by the (cathedral) chapter.

Mid Trecento (14th century), the area suffered health problems like malaria and from its poor position, even for drinking water, leading to the city being abandoned and the countryside depopulated by harsh feudal impositions.

[7] It has had the following incumbents, so far of the fitting Episcopal (lowest) rank : Cerenzia relies on the production of oil, wine, cereals, citruses and the intense breeding of the cattle.