Letnitsa Municipality () is a small municipality (obshtina) in Lovech Province, Central-North Bulgaria, located on the border between the area of the Fore-Balkan and the Danubian Plain. It is named after its administrative centre - the town of Letnitsa.
The municipality embraces a territory of with a population of 5,101 inhabitants, as of December 2009.
Letnitsa Municipality includes the following 4 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: