Margaret Ingels (October 25, 1892 – December 13, 1971) was an American engineer. She is known as the first female engineering graduate from the University of Kentucky, receiving her Bachelor of Science degree in Mechanical Engineering in 1916. She was also the second woman engineering graduate in the United States and the first woman to receive a professional degree of Mechanical Engineer. Her work on air conditioning included "developing the “effective temperature” scale to incorporate humidity and air movement in the equation for human comfort."