Christian Nielsen
Christian Nielsen may refer to:
- Christian Nielsen (rower), Danish rower
- Christian Nielsen (Danish sailor), Danish sailor
- Christian Nielsen (Belgian sailor), Belgian sailor
- Christian Nielsen (footballer), Danish football player
- Christian Nielsen (football manager), Danish football manager
- Christian [Overgaard Nielsen], Danish zoologist and ecologist
- Christian [Frühstück Nielsen], Danish architect
- Christian [Charles Nielsen], American spree killer