Coordinates: 44°3′N 26°37′E / 44.05°N 26.617°E / 44.05; 26.617

Tutrakan (Bulgarian: Тутракан, Romanian: Тurtucaia) is a town in northeastern Bulgaria, an administrative centre of the homonymous municipality, part of Silistra Province. It is situated on the right bank of the Danube opposite the Romanian town of Olteniţa (to which it is linked through a ferry), in the very west of Southern Dobruja, 58 km east of Rousse and 62 km west of Silistra. As of December 2009, the town has a population of 9,476 inhabitants.

The town was founded by the Ancient Romans in the end of the first half of the 1st century under the name Transmarisca. The settlement was part of the Roman military boundary in the 1st and 3rd century and reached its apogee in the 4th century, when, under the personal management of Diocletian, it was made one of the largest strongholds of the Danubian limes.

The ancient town and fortress were destroyed in the beginning of the 7th century and the modern town carrying its present name emerged in the end of the century, remaining a military centre through the Middle Ages as part of the Bulgarian Empire, which was conquered by the Ottomans in the late 14th century.