Mġarr has two important prehistoric sites: Ta' Ħaġrat, which is still in a good state of preservation, stands in a field near the village centre; Ta' Skorba, excavated in 1963, lies just outside the village.
Mġarr's history is that of a farming community patronised by various of the Mdina patrican families. Mgiarro was granted by the King of Sicily to the Inguanez family, and over time they sold it to the Falsone family. Over time, land was split up and given to all descendants.
Mġarr today has grown quite large, though still considered a country town with fresh clean air away from the major industrial towns of Malta.
Mġarr's rustic environs embrace several rustic spots like Binġemma, Wardija, Fomm ir-Riħ, Għajn Tuffieħa and Ġnejna Bay. San Andrea School and San Anton School are private schools located within one of Mġarr's scenic valleys.