Judy Walker may refer to:
- Judy L. Walker, American mathematician
- Judy Walker, an injured victim in the 1986 Edmond post office shooting
- Judy Walker, acting headteacher of the Prescot School in England as of its 2009 closure
- Judy Walker, part of the winning women's team at the 1979 Canadian Junior Curling Championships
- Judy Walker, fictional babysitter on the Leave it to Beaver episode "No Time for Babysitters"; see Leave It to Beaver characters
- Judy Walker, fictional character in the 1937 film Rhythm in the Clouds
- Judy Walker, fictional character in Bridesmaids (2011 film)