Nikolaj
Nikolaj is a given name, and may refer to:
- Nikolaj Abraham Abildgaard, Danish artist
- Nicolaj Agger, Danish professional football player
- Nikolaj Coster Waldau, Danish actor
- Nikolaj Frederik Severin Grundtvig, Danish teacher, writer, poet, philosopher, historian, pastor, and politician
- Nikolaj Gavric, footballer from Switzerland who currently plays as midfielder for FC Concordia Basel in the Swiss Challenge League
- Nikolaj Hansen, Danish football player
- Nikolaj Hübbe. balletmaster of the Royal Danish Ballet and former principal dancer at the New York City Ballet
- Nikolaj Nyholm, a Danish serial technology entrepreneur and investor
- Nikolaj Znaider, Danish violinist