Luella Agnes Owen (September 8, 1852 – May 31, 1932) was born in St. Joseph. She  was a speleologist and geologist, noted for her studies on Caves in Missouri.

Luella became fascinated with shells and fossils when the road in front of her house was graded. She was four or five at the time. She was also fascinated with caves and the loess soil hills of the Missouri River valley. In 1873 she explored the caves near the newly completed Missouri River bridge in St. Joseph. Later she studied glacial deposits in Northern Minnesota and the caves in Southern Missouri. She is believed to be a self taught geologist.

Luella wrote books and papers and traveled the world doing research and presenting papers. She was elected a life fellow of the American Association for the Advancement of Science, and in 1900, she took a year long trip around the world as a working member of the American Geographic Society.

Luella lived in St. Joseph with her two sisters her entire life in the home her parents built in 1859. All three of the Owen sisters were noted authors.

She is buried at Mt. Mora Cemetery in the Owen family mausoleum.