William Campbell (Chinese: 甘為霖; Pe̍h-ōe-jī: Kam Ûi-lîm) (1841–1921) was a ScottishPresbyterianmissionary to Taiwan. He wrote extensively on topics related to Taiwan and was also responsible for founding the island's first school for the blind. Interested in the early history of the island (particularly the Dutch era), his knowledge of the time was such that he was called "without doubt the greatest authority on this subject living". He was likely the first European to see Sun-Moon Lake, which he named Lake Candidius after the seventeenth century Dutch missionary George Candidius.
A strong supporter of "native ministers" (i.e. Han and aborigine clergy), Campbell wrote concerning one particular incident that
...our worthy Chinese colleague received a most hearty welcome from the brethren. He seemed to have great power in speaking to them at our forenoon service. [...] Whilst listening to him, one could not but feel the importance of having an educated native ministry in every part of China. Men like Pastor Iap are able to adapt themselves in a way the missionary can never do, and to overcome difficulties which must always hamper any mere sojourner in the country.
Campbell's mission lasted for forty-six years, until he left Taiwan for the last time in 1917 to return to his native Scotland, where he died in 1921.