Kai Nielsen

Kai Nielsen is the name of:


 * Kai Nielsen (footballer)
 * Kaj Nielsen (footballer)
 * Kai Nielsen (sculptor) (1882–1924), Danish sculptor
 * Kai Nielsen (philosopher) (1926–2021), American, Canada-based professor of philosophy
 * Sixten Kai Nielsen (born 1978), Danish artist
 * Kai Ewans, born Kai Nielsen, Danish jazz musician