Arnold Dodel-Port (16 October 1843, Affeltrangen – 11 April 1908, Zürich) was a Swiss botanist and forceful advocate of Darwin's evolutionary theory. He studied biology at the University of Geneva, at the Eidgenössische Technische Hochschule in Zürich and at the University of Munich. In 1869, he received his doctorate from the University of Freiburg. In 1870, he obtained his habilitation at the University of Zürich, where from 1883 to 1903, he served as a full professor of botany. At Zürich, he founded a botanical microscopy laboratory.