Walter Alexander Kaudern (March 24, 1881 – July 16, 1942) was a Swedish zoologist and ethnographer. He made research trips to Madagascar and Sulawesi.
Kaudern became a Doctor of Philosophy in 1910 and in 1933 he succeeded Erland Nordenskiöld as the director of the Ethnographic collections at the Museum of Gothenburg. From 1906 to 1907 and from 1911 to 1912, he made research trips to Madagascar and 1916-1921 to Dutch India and Sulawesi (Celebes at the time), from where he returned to Sweden with rich zoological, botanical, anthropological and ethnographic collections. In addition to the scientific papers, Kaudern published several books on his travels, På Madagascar (1913) and I Celebes obygder (2 volumes, 1921). Among his ethnographic works Ethnographical studies in Celebes (4 volumes, 1925–1929) are the most known.