Vodnjan (pronounced [ʋɔ̌dɲan]; Italian: Dignano) is a town and municipality in Istria county, Croatia.

Vodnjan is situated 10 km north of Pula, on elevation of 135 m. It is located at the intersection of the main road Buje - Pula (M2, E751) and the regional road Vodnjan - Fažana, as well as on the railroad Divača - Pula.

According to 2001 census Vodnjan 3406 inhabitants with total municipality population of 5651. Municipality of Vodnjan had one of the most diverse ethnic structures, 3,156 Croats comprise 55,85%, 1,133 Italians 20.05%, 195 Gypsies 3,45%, 163 Serbs 2,88%, 158 Bosniaks 2,80% and 81 Montenegrins 1.43% of total population. Montenegrins formed majority in Peroj village. 73.9% are Catholics, 11.6% Muslims and 4.8% are Orthodox Christians. Many old native residents speak an Istriot language they call Bumbaro.

According to the legend, it developed out of the association of seven villas which were part of the colonial goods of Pula. Vodnjan was known as early as Roman times as Vicus Attinianum and listed in historical records in 932 at the time of Pietro Candiniano, to whom the Istrian towns were giving amphorae of good wine in exchange of protection. Inside the historic nucleus, the town preserved its characteristic Medieval look with atria and narrow streets, irregularly winding among houses, with cobble roads and facades made of cobble stone, old streets still impressively recognizable by their Gothic, Venetian Renaissance and Baroque style and many churches rich with memories and art. Among many, in the old town there is St. Jacob Church or delle Trisiere that was designated as a parochial church as early as 1212, a church that witnessed some important historical events such as the peace agreement with Pula in 1331 and the writing of the Statute of 1492.