Boynitsa Municipality (Bulgarian: Община Бойница) is a small frontier municipality (obshtina) in Vidin Province, Northwestern Bulgaria, located in the Danubian Plain about 20 km southwest of Danube river.

The area borders on the Republic of Serbia to the west and northwest.

The municipality embraces a territory of 166 km2 (64 sq mi) with a population of 1,717 inhabitants, as of December 2009.

[1] Boynitsa Municipality includes the following 8 places all of them villages: The following table shows the change of the population during the last four decades.

As of most recent statistics from 2023, the population of Boynitsa dropped further to 744 people.