Zavet Municipality () is a municipality (obshtina) in Razgrad Province, Northeastern Bulgaria, located in the Ludogorie geographical region part of the Danubian Plain. It is named after its administrative centre - the town of Zavet.
The municipality embraces a territory of with a population of 11,338 inhabitants, as of December 2009.
Zavet Municipality includes the following 7 places (towns are shown in bold):
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: