Alexander Popov may refer to:
- Aleksandr Dmitriyevich Popov (born 1991), Russian footballer
- Alexander Ivanovich Popov (born 1943), Soviet physicist and inventor
- Aleksandr Sergeyevich Popov (born 1971), Russian footballer
- Alexander Stepanovich Popov (1859–1906), Russian physicist
- Popov (crater), a lunar crater named after him
- 3074 Popov, an asteroid named after him
- Alexander Popov (film), a 1949 film about him
- Alex Popov (architect) (born 1942), Australian architect
- Alexander Popov (swimmer) (born 1971), Russian swimmer
- Alexander Popov (biathlete) (born 1965), Russian biathlete
- Alexander Popov (figure skater) (born 1984), Russian pair skater
- Alexander Popov (musician), Bulgarian chief conductor, founder of the Sofia Symphonic Orchestra
- Aleksandr Popov (canoer) (born 1975), Uzbekistani sprint canoer
- Alexander Popov (ice hockey) (born 1980), Russian professional ice hockey forward