A vacuum cleaner with bag mount and disposable bag is described. In some embodiments, the vacuum bag may include a semi-permeable dirt bag having a top edge, a generally flat collar having a top edge, and a first opening in the collar configured to accept a dirty air nozzle, where the top edge of the vacuum bag does not extend beyond the top edge of the collar. In some embodiments, the vacuum cleaner may include a dirty air nozzle, a vacuum bag having a substantially rigid collar including a dirty air opening, and at least one void used for alignment of the collar; a mounting member releasably connected to the vacuum cleaner and movable between a loading position and a fully closed position, and a latch to releasably retain a top edge of the collar to keep the mounting member in the fully closed position.