It is understood that three holiday homes in The Beaches in Rathmullan was targeted between Monday and Tuesday.
A number of items were taken during the raids including DVD players, televisions and other items.
It coincides with other burglaries in the Downings area where home-heating oil has been stolen from holiday homes.
Five other homes were targeted in the Letterkenny area in recent days which resulted in thousands of euro of property including two cars being stolen.
Gardai have warned owners to ensure that houses have proper security measures in place.