Magçtab is a Maltese village. It lies in the valley of the same name in the local council of Naxxar. It is the site of the largest landfill in the island, commonly known as 'Mount Magçtab'. That landfill was closed when Malta joined the EU in 2004, but two others were subsequently opened.
The Il-Widna acoustic mirror is located away. The hill of àebel San Pietru also lies within the confines of Magçtab.
In December 2021, residents noticed new excavated rock and construction waste, forming a new 'waste mountain'.