Imants Viesturs Lieģis (born April 30, 1955) was Latvia's ambassador extraordinary and plenipotentiary to Hungary.
He served as Latvia's defence minister from 2009 to 2010. Lieģis was appointed to the defence ministry post in March 2009, as part of the new six-party coalition government headed by Valdis Dombrovskis. In 2010 joined the Civic Union party and was elected to the Parliament, he was Chairman of the European Affairs Committee and Chairman of Delegation to the NATO PA until October 2011.
He is a board member of the European Leadership Network.
A career diplomat, Lieģis served previously as Latvia's ambassador to NATO, a post to which he was appointed in 1997 while also serving as ambassador to the Benelux countries. Ambassador to the Kingdom of Spain from September 2008 to March 2009.
He was born in the United Kingdom. Trained in law, Lieģis worked as a solicitor in the Supreme Court of England and Wales from 1979 to 1991.