Sir Alexander Lockwood Smith (born 13 November 1948) is a New Zealand politician and diplomat who was High Commissioner of New Zealand to the United Kingdom from 2013 to 2017, and Speaker of the House of Representatives from 2008 to 2013.
Smith is a member of the New Zealand National Party and served as a Member of Parliament (MP) from 1984 until his retirement to pursue diplomatic roles in 2013.
He represented first the Kaipara electorate and then Rodney, and has held a number of Cabinet positions; he was Minister of Education from 1990 to 1996 and subsequently served as Minister of Agriculture, Minister for International Trade, and Associate Minister of Finance.