Peter Gerald Hain, Baron Hain,, is a British politician who served as Secretary of State for Northern Ireland from 2005 to 2007, Secretary of State for Work and Pensions from 2007 to 2008 and twice as Secretary of State for Wales from 2002 to 2008 and from 2009 to 2010. A member of the Labour Party, he was Member of Parliament (MP) for Neath between 1991 and 2015.

The secretary of state for Northern Ireland, also referred to as the Northern Ireland secretary or SoSNI, is a secretary of state in the Government of the United Kingdom, with overall responsibility for the Northern Ireland Office. The incumbent is a member of the Cabinet of the United Kingdom.