Sir Alexander MacPherson Fletcher (26 August 1929 - 16 September 1989) was a British Conservative Party politician.

Fletcher became a Member of Parliament (MP) at the Edinburgh North by-election of 1973, serving there until 1983, when after boundary changes he became MP for Edinburgh Central. However, at the 1987 general election he lost his seat to future Labour Chancellor of the Exchequer Alistair Darling.

Fletcher was Under-Secretary of State for Scotland from 1979 to 1983, and Minister for Corporate and Consumer Affairs 1983 to 1985.