James Floyd Scott FRS (4 May 1942 – 6 April 2020) was an American physicist and research director at the Cavendish Laboratory, University of Cambridge. He is considered one of the pioneers of ferroelectric memory devices. He was elected to the Royal Society in 2008.

He was awarded the Materials Research Society gold medal in 2008 and Slovenia's Jožef Stefan gold medal in 2009. He was a member of the American Physical Society from 1974, a Fellow of the Royal Society from 2008, and a member of the Slovenian Academy of Sciences and Arts since 2011. In 2014 he was listed by Thomson Reuters as among the most highly cited physicists. In 2016 he was awarded the UNESCO medal for contributions to nanoscience and nanotechnology.