QSF may refer to:

• Quebec Soccer Federation
• Qalamoun Shield Forces, a Syrian militia
• IATA code for Ain Arnat Airport, an airport in Algeria
• Unofficial code for airports in the San Francisco Metropolitan Area, used in some ticketing systems but not approved by IATA
• Extension and file format for data files exported by Qualtrics online survey software

• Mackworth Island
• Macky auditorium
• MacLachlan
• Maclagan
• MacLaines of Lochbuie
• Mac Lane planarity criterion
• MacLane planarity criterion
• Maclaren
• MacLaren
• MacLaren Youth Correctional Facility
• Mac Larson
• Maclaud's horseshoe bat
• MacLaughlin Arena
• MacLaughlin Award
• Maclaurian series
• MacLaurin
• MacLaurin inequality
• MacLaurin Inequality
• Maclaurin inequality
• Maclaurin integral test
• Maclaurin polynomial
• MacLaurin series
• Maclaurin's inequalities
• MacLaurin's Inequality
• Maclaurin's inequality