Nicolau is a Portuguese and Catalan given name, a variant of Nicholas.

Nicolau may refer to:

• Nicolau Coelho, Portuguese explorer
• Nicolau dos Reis Lobato (1946–1978), East-Timorese politician
• Nicolau Tolentino de Almeida (1740–1811), Portuguese satirical poet of the 18th century
• José Nicolau Huguet (1855–1909), Spanish painter

• Cristina Nicolau (1977–2017), Romanian triple jumper

• All pages with titles beginning with Nicolau
• All pages with titles containing Nicolau
• Nicola (name)
• Nicolae (name)
• Nicolai (given name)
• Nicolaj
• Nicolao
• Nicolas (given name)
• Nicolau (surname)
• Nicolay
• São Nicolau (disambiguation)