When Eliza Mitchell was born on 18 October 1806, in Monroe, Waldo, Maine, United States, her father, Jeremiah Mitchell, was 27 and her mother, Mary Simmons, was 22. She married Daniel Putnam on 18 July 1839, in Monroe, Waldo, Maine, United States. They were the parents of at least 3 sons and 3 daughters. She lived in Frankfort, Waldo, Maine, United States in 1850. She died on 12 February 1874, in South Thomaston, Knox, Maine, United States, at the age of 67, and was buried in Weskeag Village Cemetery, South Thomaston, Knox, Maine, United States.