Farry held his North Down seat in the 2011 Assembly election, and was subsequently appointed Minister for Employment and Learning in the 4th Northern Ireland Executive. In September 2011, Farry announced a freeze on tuition fees in Northern Ireland, with fees only subject to an inflationary rise. Following the decision by Alliance Party councillors to vote in favour of restricting the flying of the Union flag at Belfast City Hall to 17 specific days throughout the year in December 2012, Farry's constituency office in Bangor was the subject of an attempted arson attack. In February 2013, he launched a review of apprenticeships and youth training, aiming to build a "gold standard" system capable of "rebalancing of the local economy and meeting the specific needs of business for a highly-skilled workforce". The 32 proposals launched by the department in June 2014 included incentives for businesses, and were welcomed by the Confederation of British Industry, the Federation of Small Businesses and NUS-USI. Following the 2016 elections, Farry had been tipped by The Irish News to succeed David Ford as Minister of Justice. However, with the Alliance Party opting to enter opposition, he returned to the backbench. He subsequently assumed positions on the Stormont Committee for the Economy and Business Committee, remaining on these until the collapse of the Assembly in February 2017.
Following the resignation of David Ford as Alliance leader on 5 October 2016, Farry was named by The Irish Times as a potential leadership contender alongside Naomi Long. However, he did not stand as a leadership candidate and was later elected unopposed as Deputy Leader of the party. In the 2017 Assembly election, Farry increased his share of first-preference votes in North Down to 7,014 and was re-elected on the first count. He currently serves as Alliance's Brexit spokesperson and has strongly advocated for a People's Vote, argued against a no-deal Brexit and maintains that the Northern Ireland backstop must be part of any Withdrawal Agreement should the UK leave the European Union.
Member of Parliament
On 13 December 2019, Farry was elected to represent the constituency of North Down in the 2019 general election. Farry replaced long-term incumbent Lady Sylvia Hermon, who had stepped down at the election after eighteen years as an Ulster Unionist, and later independent, MP. Farry made his maiden speech on 20 December 2019, starting his speech in Irish to "reflect the shared traditions of Northern Ireland"; it was the first time since 1901 that a maiden speech had been conducted in Irish, when Thomas O'Donnell was chastised by the then-Speaker for not speaking in English in the chamber. In May 2020, Farry was one of a number of politicians warned that he was under threat from loyalist paramilitaries. The threat was believed to have come from elements of the UDA in south-east Antrim.