Lena Kellogg Sadler (June 9, 1875 – August 8, 1939) was an American physician, surgeon, obstetrician, and eugenicist who was a leader in women's health issues.

It includes Mrs. J Paul Good, recently deceased; Dr. Lena Sadler, Jane Adams..."[10] Dr. Bertha Van Hoosen, the Michigan Petticoat Surgeon, recalls, "In 1892, Chicago and the practice of medicine were so new to me that I was not even aware of the fight that medical women staged at that time for representation at the Columbian World's Fair.

When Dr. Sarah Hackett Stevenson found out that medical women were to be allowed no part in that greatest of all fairs, she gathered her forces together and succeeded in getting a state appropriation for a Woman's Hospital exhibit.

In protestation, Dr. Lena Sadler and I appealed to the management for representation and space for some exhibit in the Hall of Science.

However, there were a dozen applicants for the space, and if we wanted it, we would have to compete by presenting a perfect model of a maternal hygiene exhibit with all specifications.

My democratic program was to collect one dollar from every medical, dental, and allied science woman in the United States, but Dr. Sadler said, 'No, no.