Katherine Aiken (March 24, 1879 - January 12, 1990) was an American verified supercentenarian. She was born as Katherine E. Grob in Cleveland, Cuyahoga County, Ohio. Her parents were Jacob and Elizabeth Grob. She married Howard Aiken on October 12, 1897. Together, they ran a plumbing business. The couple had one child in total. She was active in the Republican party. She became a widow in 1929.

She died on January 12, 1990, at the age of 110 years, 294 days.


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