Katie Spencer is a British set decorator. 

She has been nominated for an Academy Award for Best Production Design seven times for her set decoration in Joe Wright's films: Pride & Prejudice (2005), Atonement (2007), Anna Karenina (2012), and Darkest Hour (2017), and for the major box office successes such as Guy Ritchie's Sherlock Holmes (2009), Bill Condon's Beauty and the Beast (2017), and Greta Gerwig's Barbie (2023). She has worked on many films and TV series with British art director Sarah Greenwood. Spencer is a member of the Set Decorators Society of America.