Ruzhintsi Municipality (Bulgarian: Община Ружинци) is a municipality (obshtina) in Vidin Province, Northwestern Bulgaria, located in the Danubian Plain about 8 km south of Danube river.

The municipality embraces a territory of 232 km2 (90 sq mi) with a population of 4,890 inhabitants, as of December 2009.

[1] The main road E79 crosses the southern parts of the area, connecting the province centre of Vidin with the city of Montana and respectively with the western operating part of the Hemus motorway.

Ruzhintsi Municipality includes the following 10 places all of them villages: The following table shows the change of the population during the last four decades.

According to the latest Bulgarian census of 2011, the religious composition, among those who answered the optional question on religious identification, was the following: An overwhelming majority of the population of Ruzhintsi Municipality identify themselves as Christians.