When Sarah Jane Brooks was born on 7 November 1842, in Muscatine, Iowa, United States, her father, Benjamin Brooks, was 50 and her mother, Nancy Olive Harris, was 44. She married William L Hildreth on 13 July 1858, in Linn, Iowa, United States. They were the parents of at least 5 sons and 2 daughters. She lived in Clark, Washington Territory, United States in 1870 and Moxee City, Yakima, Washington, United States in 1900. She died on 26 September 1910, in Yakima, Yakima, Washington, United States, at the age of 67, and was buried in Union Gap, Yakima, Washington, United States.