Marie Louise Hamilton Mack (10 October 1870 – 23 November 1935) was an Australian poet, journalist and novelist.

Mack attended Sydney Girls High School where she met Ethel Turner.

[5] On a visit to New Zealand in 1920, Mack and two others went missing for three days while mountain climbing in the Tararua Range, Otaki.

[11] While back in Australia, in 1917–1918, she used her lectures on her war experiences to raise money for the Australian Red Cross Society.

In the 1930s, she wrote a series of humorous but helpful articles for the Australian Women's Weekly, titled "Louise Mack advises".