(born July 17, 1854 - April 1, 1925) was a German-born Australian botanical collector. Born in Berlin, Koch was apprenticed to a merchant's office, but, not liking the work, joined the crew of a Glasgow-based sailing ship at Bremerhaven. He left it at Port Augusta, South Australia in April 1878, taking work at a wheat farm. Later he moved to Mount Lyndhurst sheep station, where he remained for many years. Around 1896 he began serious botanical collecting. Koch visited Germany around 1902-1903, then returned to Australia, and in 1904 moved to the extreme south-west of Western Australia, where he spent the next 17 years working in the timber industry. By that time he had a large family, and he supplemented his income by plant specimens, and, in his later years, seed. He died at Pemberton, Western Australia in 1925