Agbia was an ancient city and diocese in the Roman province of Africa Proconsularis. It is currently a Roman Rite Catholic titular see.

Agbia was located at the site of modern Aïn-Hedia in Tunisia.

It had a bishop, who was suffragan to the Metropolitan Archbishop of Carthage.

The bishopric was nominally revived in 1916 as a titular see of the lowest (episcopal) rank in 1916, and has several, near-consecutive incumbents, but underwent name changes of the see during the first incumbency: Agae > (1925) > Aga > (1933) Agbia

• Michele Godlewski (later Archbishop) (1916.10.21 – 1949.01.14)
• Inácio João Dal Monte, O.F.M. Cap. (1949.03.15 – 1952.05.21)
• Alfonso Zaplana Bellizza (1952.07.14 – 1957.12.17)
• Bartholomew Kim Hyeon-bae (김현배 바르톨로메오) (1957.01.26 – 1960.04.30)
• Leo Lemay, S.M. (1960.06.14 – 1966.11.15)
• António Valente da Fonseca (1967.01.10 – 1971.01.27)
• Jakob Mayr (1971.03.12 – 2010.09.19)
• Pedro Cunha Cruz (51) (2010.11.24 – 2015.05.20)
• Uriah Ashley (2015.06.25 – ...), Auxiliary Bishop of Panama

• GigaCatholic, with incumbent biography links

36°23′35″N 9°13′42″E / 36.3931°N 9.2284°E / 36.3931; 9.2284