The FX biker drama, created by Kurt Sutter, was recommissioned for a fifth run back in October.
A sixth season has now been requested before the fifth has premiered, as part of Sutter's new deal with Twentieth Century Fox TV and FX Productions, according to The Hollywood Reporter.
In addition, a seventh year of the show - which stars Charlie Hunnam, Katey Sagal and Ron Perlman - is also under consideration.
"There's a part of me that does see being able to tell this story in seven seasons," said Sutter.
"[But] I almost feel like when you hang that kind of finality and put a period on something, there's almost a backlash that happens with the fan base."
The showrunner added that Sons could even continue into an eighth season and beyond.
"If there's more story to be told after seven seasons and if financially it's still a feasible endeavour, I'm definitely open to doing more," he admitted.
Sutter's deal with FX will also allow him to develop new shows for the cable network, in addition to new episodes of Sons of Anarchy.
The fourth season of Sons of Anarchy concluded on December 6. Thirteen new episodes are expected to air in late 2012.
> Maggie Siff interview: 'There is no other show like Sons of Anarchy'
Watch a promo for the fourth season of Sons of Anarchy below: