Abdelhamid Abaaoud died during police raids in the area of Saint-Denis in Paris yesterday morning.
French Interior Minister, Bernard Cazeneuve, also implicated Abaaoud in four out of six attacks foiled in France since this spring.
The body of the 28 year old Belgian national was discovered with multiple bullet and shrapnel wounds in a flat. He was identified by his fingerprints.
Officers engaged multiple suspects in gunfire for several hours, after a tip-off that Abaaoud was still in Paris.
A woman, believed to be Abaaoud's cousin Hasna Aitboulahcen, blew herself up during the raids.
129 people were killed last Friday in a series of bombings and shootings across the city.
Earlier Belgian police raided properties in and around Brussels that were linked to two other suspects; Salah Abdeslam and Bilal Hadfi.
Sean Oliver-Dee is a Christian who has written a book on Islamic extremism, entitled 'The Caliphate'. He told Premier's News Hour: "In one sense you are pleased that the French have got their man, but the whole circumstances are tragic really. The ideology that got them into doing these acts in the first place is one of the great tragedies of our time."
Mr Oliver-Dee agrees with the French Prime Minister, Manuel Valls, who has warned of further attacks.
"I don't think there's much doubt that there will be. They've said I think that just in the last six months here in Britain quite a number of operations have been disrupted. Again it comes back to the ideology, which says that these kind of killings are ok. The idea behind it is to instil terror and make people so nervous that they will not want to fight anymore.
Mr Valls believes that future attacks could involve Islamic State militants using chemical or biological weapons.
Mr Oliver Dee says it is always tragic when someone dies believing in evil ideologies: "The bottom line is that you want everyone to know the hope that we have in Christ and the hope that his gospel holds out, not just to the lovely but those who you would revile as well."