Prince Nikolai of Denmark, Count of Monpezat (Nikolai William Alexander Frederik; born 28 August 1999), is a member of the Danish Royal Family. He is the elder son of Prince Joachim and his first wife, Alexandra, Countess of Frederiksborg. As of 2016, Prince Nikolai is seventh in the line of succession to the Danish throne. At the time of his birth, he was third, after his uncle and father.

Prince Nikolai was born at Rigshospitalet (Copenhagen University Hospital) on 28 August 1999. Prince Nikolai is the oldest grandchild of Queen Margrethe II of Denmark and her husband, Prince Henrik. In addition, the prince is of Chinese descent, as his mother is a great-granddaughter of Mary Ho Li from Guangdong, China. He was christened in chapel of Fredensborg Palace on 6 November 1999 by the royal vicar Christian Thodberg. At the christening the musical work Lys på din vej composed by Frederik Magle, dedicated to Prince Nikolai, was performed for the first time.

After their divorce, Prince Joachim and Alexandra have joint custody of Prince Nikolai and Prince Felix.

As his father and uncle, Nikolai attended Krebs School in Copenhagen. In 2014, he took 10th grade at Herlufsholm School at Næstved and is expected to take his upper secondary education there as well.

Nikolai was confirmed on Saturday, 18 May 2013 in Fredensborg Palace Church in the presence of his immediate family and all his godparents.