Mary B. Kribs was born around 1844 in Ontario, Canada, to William Kribs and Phoebe Cramer. Her father was a carpenter who owned $1,100 of real estate by 1850. The family immigrated to America in the 1840s and settled in Beaver, Dam, Wisconsin. They moved to Trempealeau, Wisconsin, in the 1850s, and she attended school there. She married Union veteran Aaron Kribs, and they had at least four children: Roland, born around 1869; Milton, born around 1871; Clara, born around 1874; and Lucy, born around 1882.
They lived in Trempealeau, and her husband worked as a carpenter. They moved to Dayton, Washington, around 1882. She played a prominent role in the local Woman’s Relief Corps. Her husband died on August 8, 1901. She applied for a widow’s pension that October and eventually secured one. By 1910, she was living in her daughter Clara’s household in Dayton. She died in Garfield County, Washington, on April 1, 1914.