Alexander Fraser may refer to:
- Alexander Fraser of Touchfraser and Cowie, died by 1332 AD
- Alexander Fraser (Upper Canada politician) (1786–1853), soldier and political figure in Upper Canada and Canada West
- Alexander Fraser (d. 1799) (1729–1799), soldier and seigneur in Lower Canada
- Alexander Fraser (Ontario politician) (1824–1883), member of the 1st Parliament of Ontario
- Alexander Fraser, 11th Lord Saltoun (1604–1693)
- Alexander Fraser, 13th Lord Saltoun (1684–1748)
- Alexander Fraser, 14th Lord Saltoun (1710–1751)
- Alexander Fraser, 16th Lord Saltoun (1758–1793)
- Alexander Fraser, 17th Lord Saltoun (1785–1853)
- Alexander Fraser, 18th Lord Saltoun (1820–1886)
- Alexander William Frederick Fraser, 19th Lord Saltoun (1851–1933)
- Alexander Arthur Fraser, 20th Lord Saltoun (1886–1979)
- Alexander George Fraser, (1786-1865), Scottish painter
- Alexander Fraser (painter), (1827–1899), Scottish landscape painter and son of Alexander George Fraser
- Sandy Fraser, networking engineer at Bell Labs
- Alexander Fraser (Australian politician) (1892–1965), Victorian State MP
- Alexander Campbell Fraser (1819–1914), Scottish philosopher
- Alexander Cumming Fraser (1845–1944), politician in Manitoba, Canada
- Alexander G. Fraser, American computer scientist