WIG, originally an acronym for Warszawski Indeks Gieldowy (Warsaw Stock Exchange Index) is the oldest index of the Warsaw Stock Exchange, introduced on the WSE's first trading session on 16 April 1991. WIG lists 318 companies (as of 5 February 2010).

A wig is a head covering made from human hair, animal hair, or synthetic fiber that is worn for fashion or other reasons, including cultural tradition and religious observance. The word wig is short for periwig and first appeared in the English language around 1675.

Wig! is an album by American singer-songwriter Peter Case, released in 2010.