Gera(s) was an ancient city and former bishopric in Roman Egypt and remains a Latin Catholic titular see.
Its modern location, now in Egypt, is unclear. Gera(s) was important enough in the Late Roman province of Augustamnica Prima to be one of the suffragans of its capital Pelusium's Metropolitan Archbishopric. It was however to fade completely.
The diocese was nominally restored as a Latin Catholic titular bishopric in the 18th century under the name Gerrha (Gerra in Curiate Italian), which was changed in 1925 to Gera(s).
It is vacant since decades, having had the following incumbents, all of the fitting episcopal (lowest) rank: