Nicolò Arrighetti (March 17, 1709 – January 31, 1767) was an Italian professor of natural philosophy. He was born in Florence, Italy in 1709. On October 21, 1724 he became a member of the Society of Jesus; he taught natural philosophy in Spoleto, Prato and Siena. He died in 1767.His surviving works include treatises on theories of light, heat and electricity and on the causes of the movement of mercury in barometers.