List of Famous people who died in 1904

George Lennox Watson was a Scottish naval architect. He was born in Glasgow, son of Thomas Lennox Watson, a doctor at the Glasgow Royal Infirmary, and grandson of Sir Timothy Burstall, engineer and entrant at the 1829 Rainhill Trials.

Ernst, Count of Lippe-Biesterfeld was the head of the Lippe-Biesterfeld line of the House of Lippe. From 1897 until his death he was the regent of the Principality of Lippe.

Hans Hermann Behr was a German-American doctor, entomologist and botanist. At the time of his death, the San Francisco Chronicle reported that he was "reckoned among mental giants" and that he was "an authority of world-wide prominence" in many branches of science.

Friedrich Jolly was a German neurologist and psychiatrist who was a native of Heidelberg, and the son of physicist Philipp von Jolly (1809–1884).

Hans Grisebach was a German architect whose buildings provided a backdrop for many celebrities from the arts world.