Emma Perry Carr (July 23, 1880 - January 7, 1972) was an American spectroscopist and chemical educator. She went to Ohio State University from 1898 until 1899, and then Mount Holyoke College from 1900 until 1902. She stayed at Mount Holyoke as an assistant in the chemistry department until going to the University of Chicago to take her senior year in physical chemistry, receiving her B.S. in 1905. and then her Ph.D. in 1910. She returned to Mount Holyoke as a professor, being named Head of Department in 1913. She was able to establish a research program studying the ultraviolet spectra of hydrocarbons, and established a link between the frequencies of the absorptions and the enthalpy change of combustion of the compound. She was the inaugural recipient in 1937 of the Francis P. Garvan Gold Medal of the American Chemical Society (ACS), established "to recognize distinguished service to chemistry by women chemists". She retired in 1946. The chemistry building at Mount Holyoke College was dedicated in her honor in 1955. She died of heart failure in 1972 at the age of 91.