Ian Richard Kyle Paisley Jr (born 12 December 1966) is a Northern Irish businessman and former unionist politician. A member of the Democratic Unionist Party (DUP), he served as the Member of Parliament (MP) for North Antrim from 2010 to 2024, and was previously a member of the Northern Ireland Assembly for North Antrim from 1998 to 2010. Paisley is the DUP's Spokesperson for Digital, Culture, Media and Sports. He is a son of the DUP's founder Ian Paisley.

Born in Belfast in 1966, Paisley is the youngest child of the Reverend Ian Paisley and his wife Eileen Paisley, Baroness Paisley of St George's. The younger Ian, along with his twin brother (Kyle) and his three elder sisters (Sharon, Rhonda and Cherith), was brought up in a large detached house on Cyprus Avenue in east Belfast. Being the younger of the twins, he was named after his father who was the younger of two brothers. He regularly attended the Free Presbyterian Church of Ulster (where his father preached) from a very young age. In August 2007, he was the subject of the third episode of the BBC Radio 4 series The House I Grew Up In in which he talked about a happy childhood and secure family life, despite the Troubles.

After leaving primary school, Paisley was educated at Shaftesbury House College, and then in the sixth form at Methodist College Belfast, before gaining admission to Queen's University Belfast. There he gained a BA (Hons) in Modern History followed by a MSSc in Irish Politics. After finishing his postgraduate studies, he worked for his father as a political researcher and parliamentary aide.

In 1996, Paisley was elected to the Northern Ireland Forum for North Antrim. He was returned for the constituency to the Northern Ireland Assembly in 1998. He is one of three DUP members who have taken their seats on the Northern Ireland Policing Board, and is also the party's justice spokesman and press officer.

Paisley successfully ran to succeed his father as the MP for North Antrim in the 2010 UK general election, winning 46.4% of the vote share. Upon his election as MP, he resigned his seat in the Northern Ireland Assembly.

Although there were rumours that Paisley Jr was positioning himself to become leader of his party, he denies any such ambition: "I've no ambition for that at all. I've never had any ambition to get anywhere beyond where I am today. Some people sought to put the knife in, in order to stop me, because they were concerned about me wanting to be leader. Well, they misjudged me completely."

In 2022, Paisley introduced a private members' bill that proposed to alter how future referendums on constitutional change, and thus Northern Ireland's ability to leave the United Kingdom, would be ratified. Paisley's bill would have changed the law so that a simple majority vote would no longer be enough for reunification with Ireland, and instead a higher bar of a supermajority would be required for an affirmative result to be declared. However, Paisley's actions were ridiculed by fellow Northern Irish MPs Stephen Farry and Claire Hanna, who both described it as a political stunt and highlighted that it would never be debated by or voted upon by the UK Parliament.

For the fifth consecutive time, Paisley was re-selected by the DUP for the 2024 general election. With a majority of 12,721 from 2019, he was expected to retain North Antrim, though not without a challenge from the Traditional Unionist Voice leader Jim Allister. He was endorsed by Reform UK leader Nigel Farage, despite the agreed alliance between TUV and Reform. However, in a shock result, he was voted out of office by his own constituents after Allister narrowly defeated Paisley, winning the seat with a majority of 450. In total, he received 11,192 votes (27.2%), a decrease of 23.7%. The loss of North Antrim marked the end of 54 years of the constituency being in the hands of the Paisley family.