Nikolai Alekseev may refer to:
- Nikolai Alekseev (Catholic priest) (1869–1952), Russian Greek-Catholic priest
- Nikolay Alexeyev (born 1977), Russian gay-rights activist
- Nikolay Alekseyev (mayor of Moscow) (1852–1893), Russian entrepreneur, philanthropist, and public figure
- Nikolai Alekseev (conductor) (born 1956), Russian conductor
This disambiguation page lists articles about people with the same name.
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