Robert "Willie" Pickton was given an automatic life sentence when a jury in British Columbia found him guilty of murder.
He still faces murder charges for the deaths of 20 more women, most of them prostitutes and drug addicts from a seedy Vancouver neighborhood.
If convicted on all those charges, he would become Canada's most prolific serial killer.
Police are still investigating the cases of almost 40 other missing women.
The remains of the six women he was convicted of killing were found on Pickton's farm, but he denied he was responsible for their deaths.
During his trial, a prosecution witness, Andrew Bellwood, said Pickton told him how he strangled his victims and fed their remains to his pigs.
Health officials once issued a tainted meat warning to neighbours who might have bought pork from Pickton's farm, concerned the meat might have contained human remains.