Dystis was a city and bishopric in Roman Libya, which remains a Latin Catholic titular see.
Its modern location has been postulated in northern Tunisia or somewhere in southern modern Libya.
Dystis was important enough in the Roman province of Libya Superior -Libya Pentapolitana; originally part of Cyrenaica (and Crete)- to become one of the suffragan sees in this province, which depend directly on the Patriarchate of Alexandria (in Egypt) without a proper Metropolitan, but faded like most bishoprics in Roman Africa.
Its only recorded Suffragan Bishops were:
In 1933 the diocese was nominally restored as Latin Titular bishopric of Dystis / Dystien(sis) (Latin adjective) / Disti (Curiate Italian).
It is vacant, having had only these incumbents, all of the fitting Episcopal (lowest) rank, with an archiepiscopal exception (pro hac vice):