Hasan was born to parents. His father, Raza Hasan, is an engineer from , .

Hasan was educated at , a day independent school for boys at Sandy Lodge in the of , near the town of in North West London. He then attended , University of Oxford, where he read (PPE), and graduated in 2000.

Hasan worked as a researcher and then producer on 's programme, with a brief period in between on 's . Following this, he became deputy executive producer on before moving to as their editor of news and current affairs. He was appointed senior editor for politics at the in late spring of 2009, where he stayed until May 2012, then becoming political director of website.

Hasan became a presenter on Al Jazeera's English news channel in May 2012. Hasan has appeared (six times) on the BBC's programme, and the Sunday morning programmes and .

In 2013, Hasan took part in a debate at the to consider whether Islam is a peaceful religion. Hasan vouched for Islam as a religion of peace, citing political and cultural reasons for violence in Muslim majority countries, as opposed to holding the religion of Islam responsible. In the vote on the motion, the house affirmed with Hasan and the other proposers that Islam is a religion of peace with 286 votes in favor and 168 votes against. The video of the debate remains one of the most viewed videos on Oxford Union's YouTube channel.

Recorded at the Oxford Union, Head to Head is a programme on Al Jazeera English in which Hasan interviews major public figures; it had run for three series by December 2014. Since 2015, working full-time for the network in Washington D.C., Hasan has hosted a weekly interview and discussion programme.

Hasan began a podcast in 2018 entitled Deconstructed, produced by the website . On air, Hasan would discuss recent news topics and host guests. Notable topics covered on the podcast include police shootings, inequality, , and President activity on Twitter. Notable podcast guests include , , and Bernie Sanders. On 2 October 2020, Hasan announced that he would no longer host the show as part of his move to host The Mehdi Hasan Show on new streaming service, ,

Hasan became a naturalized US citizen on 9 October 2020 in time to vote in the .

Hasan currently hosts The Mehdi Hasan Show on the online service Peacock since Oct 2020 airing weeknights at 7 pm . Notable guests on The Mehdi Hasan Show have included Mark Ruffalo, , , , , , and .

He has recently launched the same show on MSNBC every Sunday evening.

In a 14 February 2013 article for the , Hasan wrote:

The was a strategic disaster – or, as the Tory minister put it in a recent BBC radio discussion, 'the most disastrous foreign policy decision of my lifetime ... worse than '. The invasion and occupation of the country undermined the moral standing of the western powers; empowered Iran and its proxies; heightened the threat from at home and abroad; and sent a clear signal to 'rogue' regimes that the best (the only?) means of deterring a pre-emptive, US-led attack was to acquire weapons of mass destruction. ... Iraq has been destroyed and hundreds of thousands of innocent people have lost their lives, as the direct result of an unnecessary, unprovoked war that, according to the former chief justice , was a 'serious violation of international law'.

A regular contributor to The Guardian, Hasan argued in November 2011 regarding the issue of Iran's alleged pursuit of : "Wouldn't it be rational for Iran – geographically encircled, politically isolated, feeling threatened – to want its own arsenal of nukes, for defensive and deterrent purposes?" Pointing out the difference between America, and its allies, going to "war with non-nuclear Iraq" and their "diplomacy with nuclear-armed North Korea", Hasan concluded: "The simple fact is there is no alternative to diplomacy, no matter how truculent or paranoid the leaders of Iran might seem to western eyes."

Hasan wrote an article in The Guardian in September 2011 condemning the Iranian government for its proposed execution of , who had been arrested on charges of . "The death sentence given to Youcef Nadarkhani in Iran is an affront to universal moral values and a disservice to Muslims."

Hasan, a , has written articles about Islam and Muslims for the and newspapers. "My Islamic faith is based on the principles of peace, moderation and mercy", he wrote in September 2012. He also said that while Muslims "have every right to be angry", such "anger, however, is not an excuse for extremism."

In April 2009, Hasan argued against the concept and idea of an . He argues that "Today it is difficult, if not impossible, to identify a Muslim-majority nation that could plausibly be identified as a modern, viable and legitimate 'Islamic state'" and that "contrary to popular Muslim opinion, there is not a shred of theological, historical or empirical evidence to support the existence of such an entity."

In November 2009, Hasan wrote a column denouncing from an Islamic perspective. Hasan argued that "There is, in fact, nothing Islamic about so-called Islamic terrorism… So why are many Muslims so reluctant to condemn such cold-blooded ?"

In April 2010, Hasan wrote a piece condemning the controversial Islamic advocacy of the death penalty for apostasy in the New Statesman. He states that "The sharia (or ), it is claimed, sanctions the death penalty for any adult Muslim who chooses to leave the faith, or apostatise. This is an intellectually, morally and, perhaps above all, theologically unsustainable position."

In April 2012, Hasan wrote an article criticising for being obsessed with foreign affairs and the anti-war movement. He criticised British Muslims' apparent apathy towards national issues: "Why is it that most British Muslims get so excited and aroused by foreign affairs, yet seem so bored by and uninterested in and the economy?"

Following allegations of by British peer in March 2013, Hasan referred to antisemitism in the British Muslim community as being "routine and commonplace".

In May 2013, he appeared at an debate proposing a motion arguing that Islam is a religion of peace. The motion was carried.

Following the , Hasan wrote an article in criticising what he referred to as the "common stereotype of the Middle Eastern, Muslim-born terrorist." He pointed out that the perpetrator of the attack, Khalid Masood, was born and raised in the United Kingdom and, therefore, would not have been affected by any . He also pointed out that Masood converted to Islam late in life and had a history of criminality prior to his conversion. Hasan concluded, ergo, that while "a distorted, simplistic and politicized form of Islam" provided the justification for Masood's actions, the main motivation lay in "social networks and family ties; issues of identity and belonging; a sense of persecution; mental illness; socio-economic grievances; moral outrage over conflict and torture; a craving for glory and purpose, action and adventure." Hasan also referenced to a 2008 leaked report by researchers for MI5, a 2010 Demos study, and a 2016 Egmont study, that came to similar conclusions "challeng[ing] the conventional... wisdom on the role of religion in the process."

Hasan has stated that the media should be sanctioned for "dishonest, demonising press coverage" of Muslims and other minorities, saying: "I'm all in favour of free speech and the robust criticism of all religious beliefs. But it's the made-up stories and the smearing of individuals and whole communities that I have an issue with. Why isn't as unacceptable in the press as anti-Jewish bigotry?"

In October 2013, on the BBC's , Hasan claimed that the Daily Mail was, among other accusations, "Muslim-smearing". The paper responded by claiming that he had applied to write a column for them in 2010, praising their editorial standards and some of their positions.

In December 2019, called Hasan's interrogation of Trump supporter Steve Rogers "the template for talking to people within the Trump-sphere."

In November 2020, the said "The Mehdi Hasan Show has fast become one of the most satisfying nightly news programs in America."

In a March 2021 interview with , Hasan said "journalists should have a bias in favor of democracy" and if journalists are "not pro-democracy, then what is the point of being a journalist?"

Hasan has defended his views in print, writing "What I would like is for my fellow lefties and liberals to try to understand and respect the views of those of us who are pro-life" in an October 2012 online column for the New Statesman. Hasan argued that the issue of abortion "is one of those rare political issues on which left and right seem to have swapped ideologies: right-wingers talk of equality, human rights and 'defending the innocent', while left-wingers fetishise 'choice', selfishness and unbridled individualism." He later regretted expressing himself in this way. However, the article gained much attention on Twitter and Hasan debated the issue with on 's programme.

Telegraph blogger thought both Hasan and his pro-choice opponents shared the modern left's "instinct for " which contrasted, he asserted, with the pre-occupations of radicals a century ago, an era in which such figures, Hasan asserted, often opposed abortion. Meanwhile, Labour MP thought that "any , worth the name, knows that control over [our] own bodies is ground zero for every educational, social and economic advance that women have made in the last century". wrote: "There are some things no one is allowed to speak of – especially if they are men."

Hasan has made several statements in opposition to the , including challenging a statement made by Donald Trump, in which he claimed that he himself had no financial interests in Saudi Arabia, an allegation which Trump called "fake news". Hasan challenged Trump's statements in a video essay published by in October 2018.

In February 2019, during a debate organised by in London, Hasan stated that the West should cut ties with Saudi Arabia, saying

"It's time we make clear that the West needs to cut its ties with Saudi Arabia, especially military ties, arms exports, weapons, bombs".

The comments were made in response to the , allegedly ordered by the Crown Prince of Saudi Arabia, , as well as several human rights violations which Hasan cited as also being carried out by Saudi Arabia. Hasan had previously interviewed Khashoggi about freedom of speech in Saudi Arabia.

During a sermon delivered in 2009, quoting a verse of the Quran, Hasan used the term "cattle" to describe non-believers. Hasan wrote in his blog: "The Quranic phrase 'people of no intelligence' simply and narrowly refers to the fact that Muslims regard their views on God as the only intellectually tenable position, just as atheists (like or ) regard believers as fundamentally irrational and, even, mentally deficient." Hasan returned to this issue in August 2012 following criticism from the columnist that "the entire 45-minute speech is primarily an attack on Muslim extremists who try and justify violence against non-Muslims on an 'ends justify the means' basis", but noted of his 2009 comments that his "phraseology was ill-judged, ill-advised and, even, inappropriate".

In March 2019, Hasan wrote a series of tweets in which he apologized again for "dumb, offensive" remarks from his past.

In January 2014, Hasan was awarded the Services to Media award at the . In 2017, he was named European Young Leader by the Brussels-based think tank.

In 2019, Hasan won the Society of Professional Journalists' Sigma Delta Chi Award for Online Column Writing.

• With James Macintyre. Ed: The Milibands and the making of a Labour leader, London, Biteback Publishing, 2011. ISBN 978-1-84954-102-2
• Summer of Unrest: The Debt Delusion: Exposing ten Tory myths about debts, deficits and spending cuts, Vintage Digital, 28 July 2011.

• at Al Jazeera English