John Wesley Judd was born on February 18. 1940, in Portsea Island, Hampshire, England.

He was a British geologist. He was educated at the Royal School of Mines and worked for the Geological Survey of England and Wales (1867-1870). In 1871, he was on the Board of Education and worked as Inspector of Schools. In 1876, he became Professor of Geology at the Royal School of Mines (1876-1905). He was elected a Fellow of the Royal Society in 1877. He was President of the Geological Society (1886-1888) and was awarded their Wollaston Medal in 1891. He was later Dean of the Royal College of Science in London (1895-1905). In 1913, he became Emeritus Professor of Geology at Imperial College. He wrote several books, e.g., "The Geology of Rutland, and the Parts of Lincoln, Leicester, Northampton, Huntingdon and Cambridge" (1875), "Volcanoes: What They Are and What They teach" (1881), "The Eruption of Krakatoa, and Subsequent Phenomena" (1888), and "The Coming of Evolution" (1910).

In 1878, he married Jeanne Frances Jeyes (1849–1942). He died on March 3, 1916, in Richmond, Surrey, England.