Until 1 January 2007 Sallingsund municipality was a municipality (Danish, kommune) in the former Viborg County in the northwest of the Salling Peninsula, a part of the larger Jutland peninsula in northwest Denmark.
The municipality covered an area of 99 km2, and had a total population of 6,083 (2005).
The 1,717 meter long Sallingsund Bridge, which opened on 30 May 1978, connects the towns of Sallingsund to the town of Nykøbing Mors on the island of Mors, and then continues northwest to the island of Vendsyssel-Thy.
Before the bridge was built there was a train ferry connection over the strait from the town of Glyngøre to Nykøbing on the ship Pinen og Plagen ("The Torment and the Plague").
This created a municipality with an area of 682 km2 and a total population of 48,368 (2005).