Hertha Ayrton died of blood poisoning in New Cottage, North Lancing, Sussex. This date marks the end of her life and career, during which she made significant contributions to electrical engineering, mathematics, physics, and the women's suffrage movement.

Hertha Ayrton married William Edward Ayrton, a physicist and electrical engineer who was previously her teacher at Finsbury Technical College. This marriage was significant as William Ayrton was supportive of her scientific endeavors, and their partnership further propelled Hertha's research and career.