Susan Priscilla Parks (née Thew, 5 April 1878 – 29 January 1968) was an American explorer, photographer, plant collector and advocate for the expansion of the Sequoia National Park in the southern Sierra Nevada.

Parks was born in Caledonia, Ohio on 5 April 1878 to Sarah Priscilla and Richard Thew.

[4] She continued to undertake explorations of the High Sierras over subsequent summers and amassed a significant photographic record of the area.

[3][6] As a result of this and efforts by other advocates, the bill was successfully passed and the Sequoia National Park expanded to cover the Great Western Divide, the Kaweah Peaks, the Kern Canyon, and the Sierra Crest.

[8] They amassed a significant and scientifically important collection of herbarium specimens that continues to contribute to science.