Neil S. Sullivan (born January 18, 1942) is a professor of physics at the University of Florida. He attended Otago University, where he received a Bachelor of Science degree in physics in 1964 followed by a Master of Science in 1965. In 1972, he obtained his PhD from Harvard University with the thesis Nuclear Magnetism of Solid Hydrogen at Low Temperatures. Born in New Zealand, Sullivan became a naturalized United States citizen in 2004.