Janet Campbell may refer to:
- Janet Gladys Aitken (1908–1988), later Campbell, Canadian-British aristocrat and socialite
- Janet Mary Campbell (1877–1954), British physician and medical writer
- Janet Campbell Hale (born 1946), Native American writer
- Jessie Campbell (1827–1907), Jessie (Janet) Campbell, promoter of higher education for women in Scotland
- Janet Campbell (baseball), All-American Girls Professional Baseball League player