James Joseph Walsh (1865–1942) was an American physician, historian, educator, and author known for his writings on medicine, psychology, and human health. He served as a professor and medical educator and wrote extensively on the relationship between mental attitude, physical well-being, and personal development. His works explored topics such as health, psychology, medical history, and the role of will power in achieving a healthier life. His book Health Through Will Power reflects his interest in the connection between mind, character, and overall wellness.