Karen Elizabeth Walker CNZM (born December 1969) is a noted New Zealand fashion designer.

[6] She has designed clothes worn by Björk, Sienna Miller, Natalie Portman, M.I.A., Alexa Chung, Beth Ditto, Michael Haneke, Liv Tyler, Rihanna, Claire Danes, Zooey Deschanel and Jennifer Lopez.

[7][8] She designed clothes worn by Kate Winslet in the Michel Gondry film Eternal Sunshine of the Spotless Mind.

[8] In the 2004 New Year Honours, Walker was appointed a Member of the New Zealand Order of Merit, for services to the fashion industry.

[9] She was promoted to Companion of the New Zealand Order of Merit, for services to fashion design, in the 2014 New Year Honours.