C91.3FM (ACMA callsign: 2MAC) is a commercial radio station broadcasting on the FM band at a frequency of 91.3 MHz to the Macarthur region of New South Wales in Australia.

In early 2006, when Rob Doorey replaced Mal Lees (formerly of Triple M's Club Veg) & Mardi Cole, both now at other stations, for its breakfast slot, their positioner was changed to "Macarthur First".

During 2006, the 9 to 10 am slot was taken up by the final hour of Rob Doorey's "Macarthur Breakfast" program, in which it is the "At Work Network" and therefore, the "Classic 9 @ 9" was dropped from the station's schedule.

In January 2012, the station dropped "After Hours with Stolzy" from i98 in favour of its local nights program, presented by Lyndal Rogers, who has moved from Afternoons.

News Former C91.3FM journalists: Kate Zifovich, Bron Matherson, Michelle Wildner, Peter Hand, Lindsay Fisher, Kathy Koutzas, Greg (Hendo) Hendricks, Meredith Marks, Michelle Zydower, Renee Criddle, Krista Thomas, Mia Agius, Julieanne Horsman, Sally Prosser, Tracey Callaghan, Loni Cooper, James Cregan, Angela Anderson, Kate Mitchel, Paul Glover, Jonathan Lea, Beth Link, Michelle Taverniti & Kim Sexty Hosts Former C91.3FM announcers: Christian McEwan, Annabella Leone, Stuart Cranney, Josh Webster, Lyndal Rogers, Chris Jarrold, Brad 'Coasty' Hunter, Mal Lees, Rob Duckworth, Marcus Paul, Maje Saba, Fairlie Hamilton, Bianca Dye, Jabba, Mike Goldman, Ryan Cram, Glenn "Stolzy" Stolzenhein, Greg Dimon, Jem Gold, Patrick "Captain Pat" McGeown, Byron Webb & John Backer.