Bida is a former Ancient city and bishopric in Roman Africa, now a Latin Catholic titular see.
Its presumed location are the ruins at present Djemaa Sahridj in modern Algeria.
The city was important enough in the Roman province of Numidia to become a suffragan bishopric of its capital's Metropolitan Archbishop, but was to fade. Campanus represented Bida at the Council of Carthage (424).
The diocese was nominally restored as a Latin Catholic titular bishopric in the 17th century as Bitha or Bita, renamed Bida in 1923–25.
It has had the following incumbents, all of the lowest (episcopal) rank :