Prince Nirajan Bir Bikram Shah Dev (Nepali: निराजन वीर विक्रम शाह; 6 November 1978 – 1 June 2001) was a prince of Nepal, the younger son of King Birendra and Queen Aishwarya of Nepal. He was assassinated along with his parents in the Nepalese royal massacre.
He was educated at Budhanilkantha School, Kathmandu and Eton College and had a degree of B.B.A. from Kathmandu College of Management. He was interested in sports, especially swimming.
The name Nirajan means "One without fault; perfect in all forms".
Nirajan was among the victims of the Nepalese royal massacre on 1 June 2001 along with his father, mother, sister, brother and other close royal relatives.
Commemorative Silver Jubilee Medal of King Birendra (31 January 1997).