Wiig is a surname of Norwegian origin (a variant of Vik), and may refer to:

• Alf Wiig (1891–1974), a Norwegian minister and bishop
• Andreas Wiig (born 1981), Norwegian professional snowboarder
• Arne Wiig (born 1964), Swedish priest, poet, author, playwright
• Aud Marit Wiig (born 1953), Norwegian diplomat.
• Kristen Wiig (born 1973), American actress and comedian
• Marit Wiig (born 1949), Norwegian civil servant and organizational leader
• Martin Wiig (born 1983), Norwegian football striker
• Olaf Wiig (born 1975), New Zealand cameraman who was kidnapped by Palestinian gunmen
• Steven Wiig (born 1972), American musician and actor