Mary Louisa
People with the name Mary Louisa include:
- Mary Louisa Armitt British polymath
- Mary Louisa Bruce, Countess of Elgin
- Mary Louisa Chitwood, American poet
- Mary Louisa Gordon British prison inspector
- Mary Louisa Molesworth, English writer of children's stories
- Mary Louisa Page, American architect
- Mary Louisa Georgina Petrie, British author
- Mary Louisa Skinner, Australian Quaker, nurse, and writer, wrote a memoir of World War I experiences
- Mary Louisa Toynbee, British journalist
- Mary Louisa Whately, English missionary in Egypt, known for building schools
- Mary Louisa White, British composer
- Mary Louisa Willard, forensic scientist