The drama series will kick off its new 13-episode run in 2013.
Army Wives follows a group of women living in a naval base in South Carolina, while dealing with problems like deployment issues, death and addiction.
"Army Wives is a very special programme," said Rob Sharenow, the network's executive vice president of programming.
"It's rare to find a series that connects with viewers and resonates so powerfully after six straight seasons, and we couldn't be prouder to have it return to Lifetime next year."
The show features Kim Delaney, Sally Pressman, Brian McNamara, Sterling K Brown, Wendy Davis, Drew Fuller, Terry Serpico, Catherine Bell and Kelli Williams, who was promoted as a series regular earlier this year.
McNamara was recently cast in Bones for its eighth season as a pet expo owner.
Watch the sixth season trailer of Army Wives below: