Far right fanatic Thomas Mair has been handed a whole life term for murdering the Labour MP in what prosecutors called an "act of terrorism".
Mrs Cox was stabbed 15 times and shot outside her constituency office in Birstall, West Yorkshire.
The sister of slain MP Jo Cox has said the family will not be beaten by her murder and are determined to respond to the hatred of her killing with strength and love.
Kim Leadbeater said the family were still processing their grief but were "stronger and more united than ever" in a statement after Mrs Cox's killer Thomas Mair was given a whole life term for the murder.
She vowed they would continue to champion to values that the MP represented, which she described as "compassion, tolerance, acceptance, understanding and a determination to continue to fight for what is right."
She may have only served her constituents for little more than a year, but those whose lives Jo Cox touched won't forget her lasting legacy.
Thomas Mair is being described as an extremist, a fanatic, an assassin – even ‘a constituent’. But make no mistake – he is a terrorist.
Thomas Mair "betrayed the quintessence of our country" in the senseless killing of MP Jo Cox, the judge said.