Henrik Grönvold (6 September 1858 – 23 March 1940) was a Danish naturalist and artist, known for his illustrations of birds. Grönvold was among the last natural history illustrators to publish lithographs.
Grönvold had an early interest in natural history, and an early aptitude for natural history art. He studied drawing in Copenhagen, and worked first as a draughtsman of the Royal Danish Army's artillery and an illustrator at the Biological Research Station of Copenhagen. In 1892, Grönvold left Denmark intending to emigrate to the United States. While stopping in London en route, he was employed at the Natural History Museum preparing anatomical specimens. Grönvold's Swedish wife Josefine joined him a year later.
Grönvold became a skilled taxidermist, and established a reputation as an artist. He was employed at the Museum until 1895, when he accompanied William Ogilvie-Grant on an expedition to the Salvage Islands. After this expedition, Grönvold worked at the Museum in an unofficial capacity as an artist for decades, and only left London to attend an ornithological congress in Berlin.
Grönvold's illustrations largely appeared in scientific periodicals such as the Proceedings and Transactions of the Zoological Society, The Ibis and the Avicultural Magazine. In these publications, he drew plates for William Ogilvie-Grant, George Albert Boulenger, and Michael Rogers Oldfield Thomas, among others. Grönvold also completed numerous plates for Walter Rothschild, many of which appeared in Rothschild's journal Novitates Zoologicae. Grönvold mostly illustrated birds and eggs, rare and newly discovered species from many parts of the world, and mostly worked in lithographs. His egg plates include some of great auk eggs made for Alfred Newton. He made some depictions of mammals as well, and the Natural History Museum collection has oil paintings of apes he made for Rothschild.