Dora Della Thompson was born on January 26, 1920 in Freeburg, Missouri to her parents Lemuel Green "Emil" Thompson and Mary Susie Windley. She married Roy Elmo Sinden on October 19, 1939 in Linn, Missouri. They had 13 children.

She passed away on November 24, 1999 in Dixon, Missouri at the age of 79. She is buried at Meta Southside Cemetery in Meta, Missouri next to her husband Roy.