Sarah Bacon Tunnicliff (August 16, 1872 – March 18, 1957) was an American clubwoman based in Chicago.

[2] Her older sister Helen Tunnicliff Catterall, also a Vassar alumna, was a writer and a lawyer.

[3] Her younger sister Ruth May Tunnicliff, also a Vassar alumna, was a physician and bacteriologist.

[4] She was the Illinois director of education for the United States Fuel Administration,[7] and director of the fuel conservation department of the Illinois women's committee of the Council of National Defense,[8] both during World War I.

In this work, she carried a badge,[9] wrote articles about air pollution,[10] prepared posters for public education,[11] and encouraged urban households to manage their coal furnaces without unnecessary smoke.