Ian Stewart, Baron Stewartby, English politician, Minister of State for the Armed Forces (died 2018)

Bernard Harold Ian Halley Stewart, Baron Stewartby, was a British Conservative Party politician and numismatist. He was the Member of Parliament for Hitchin from February 1974 to 1983, and for North Hertfordshire from 1983 to 1992. He sat in the House of Lords from 1992 to 2015.

The Parliamentary Under-Secretary of State for the Armed Forces is a mid-level ministerial position at the Ministry of Defence in the Government of the United Kingdom. It has been held by Luke Pollard since 2024.