Vidin (Bulgarian: Видин, pronounced [ˈvidin]) is a port city on the southern bank of the Danube in north-western Bulgaria.

Vidin is the westernmost important Bulgarian Danube port and is situated on one of the southernmost sections of the river.

The New Europe Bridge, completed in 2013, connects Vidin to the Romanian town of Calafat on the opposite bank of the Danube.

The town grew into one of the important centres of the province of Upper Moesia, encompassing the territory of modern north-western Bulgaria and eastern Serbia.

Between 971 and 976 the town was the center of future Bulgarian emperor Samuil's possessions while his brothers ruled to the south.

By early 1290s the Kingdom of Serbia expanded towards the vicinity of Vidin, after defeating the Bulgarian rulers of the region of Braničevo, Darman and Kudelin.

After the death of Michael Shishman in the disastrous battle of Velbazhd in 1330, Vidin passed under the rule of his brother Belaur, who led un unsuccessful rebellion against the new emperor Ivan Alexander of Bulgaria (r. 1331–1371) until his defeat in 1336.

It covers the approaches of Servia, commands Little Wallachia, the defiles of Transylvania, and, above all, the opening of the road which leads through Nissia and Sophia on to Adrianople.

Its form is an irregular pentagon; it is strongly bastioned, possesses a fortified castle, with two redoubts in the islands, and its defences are completed by an extensive marsh.

Vidin is the 20th town by population in Bulgaria, but serious demographic problems have been experienced in the area during the last two decades.

[10] As of 2011, the town had a population of 48,071 inhabitants[11] and 35,784 inhabitants as of 2021.According to the latest 2011 census data, the individuals declared their ethnic identity were distributed as follows:[15][16] Total: 48,071 Vidin has a humid subtropical climate close to a temperate continental climate, from which it is shifting further and further away due to global warming.

A fragmented marble structure found near Vidin shows a bearded man in a Phrygian cap and Roman armor, identified as Jupiter Dolichenus, holding a thunderbolt and likely a bipennis.

This piece, dating from the late 2nd or early 3rd century, aligns with similar depictions of the deity found in other regions, suggesting a common iconographic theme.

[20][21] Close to the town lies a powerful medium wave broadcasting station (since 1973) whose signals can be easily received throughout Europe.