ACF or acf may refer to:
ACF Fiorentina, commonly referred to as simply Fiorentina [fjorenˈtiːna], is a professional Italian football club from Florence, Tuscany.
The ACF River Basin is the drainage basin, or watershed, of the A Apalachicola River, C Chattahoochee River, and F Flint River, in the Southeastern United States.
These are the matches of Fiorentina playing in Europe.
AcFun is a Chinese video sharing site which began as an ACG themed video sharing site based on Sina Video created in June 2007. Later in 2008 the site relaunched with a Niconico-style player.
ACF Brescia Femminile is an Italian women's football club from Capriolo, near Brescia. It was founded in 1995 as FCF Capriolo Arredamenti Ostilio.
ACF2 (Access Control Facility) is a commercial, discretionary access control software security system developed for the MVS (z/OS), VSE (z/VSE) and VM (z/VM) IBM mainframe operating systems by SKK, Inc.