She reportedly suffered a cardiac arrest and become taken to health facility, in which she later died.
She was the UN unique rapporteur on human rights in Iran.
A career filled with firsts and awards blanketed imprisonment and residence arrest, and five years ago leaked files counseled that a few intelligence officials had planned to kill her.
Ms Jahangir called for an inquiry on the time, stressful the authorities "discover the forces who wanted to silence" her.
extra recently she spoke out towards BBC Persian newshounds being put on trial in Iran.
top Minister Shahid Khaqan Abbasi led tributes to Ms Jahangir, pronouncing her death become a outstanding loss for the prison fraternity, and praying for her and her own family.
Punjab nation chief Shehbaz Sharif tweeted that he was "deeply saddened" on the information.
Amnesty global's South Asia director Omar Waraich said Mrs Jahangir had "never wavered".
Raza Ahmad Rumi of the Pakistan Daily Times called her a hero.
Every other outstanding Pakistani attorney, Salman Akram Raja, tweeted that Ms Jahangir turned into "the bravest person I ever knew" and that the arena become "less" without her.
In her profession, Ms Jahangir was a staunch defender of human rights and girls's rights, and a professional-democracy activist.
She turned into nominated for the Nobel Peace Prize in 2005.
She labored intently with her sister Hina Jilani on lots of her endeavours.
In 2014 Ms Jahangir informed AFP information enterprise she had visible modifications within the perception of human rights in Pakistan.
"there was a time that human rights became no longer even an problem in this u . s . a .," she stated. "Then prisoners' rights have become an problem."
"girls's rights was concept of as a Western concept. Now people do speak approximately girls's rights."
Asma Jahangir's Careers:
Known as to Pakistan's splendid courtroom at age 30
A critic of the navy status quo
Jailed in 1983 for pro-democracy activities
positioned under residence arrest in 2007 for opposing military leader's elimination of supreme court leader justice
Co-founding father of the Human Rights commission of Pakistan and of the first unfastened prison resource centre in Pakistan
Co-founder of the ladies's motion discussion board, set up to oppose law that reduced a female's testimony in courtroom to 1/2 that of a person's
the primary woman chief of Pakistan's preferrred court docket bar affiliation
Winner of several awards together with the Unesco/Bilbao prize for the promoting of a culture of human rights and the French Legion of Honour
Served as UN special rapporteur on freedom of religion and on human rights in Iran