Tinja or Tindja (تينجة) is a town and commune (municipality) in the Bizerte Governorate, in northern Tunisia, on the shores of Lake Ichkeul.

Its name derives from that of the ancient Roman era city of Thimida, a former bishopric which remains a Latin Catholic titular see.

Indeed, the lock open during the winter allows the exchanges between the two environments, in particular to maintain a sufficient degree of salinity of the waters of the lake to avoid the atrophy of the fauna and the flora.

[3] A major industrial area is established and should benefit from the rehabilitation of the road linking Tinja to Menzel Bourguiba and then joining the Tunis-Bizerte (A4) motorway.

[5] At this time, the town was the seat of an ancient Catholic diocese[6] A second Roman settlement called Gunela was located across the river, in what is today the southern suburbs of Tindja.