The Who's Who in New Zealand, originally called the Who's Who in New Zealand and the Western Pacific, is a collection of biographies that was first published in 1908, and the latest version is from 1991. The first edition was edited by the journalist and historian Guy Scholefield in association with Emil Schwabe. This was the first of a series of publications containing biographies compiled and edited by Scholefield, and it formed the basis for his later book Dictionary of New Zealand Biography, published in two volumes in 1940.
The Who's Who contained, according to Scholefield, those who had done "some definite service over and above what the individual was paid to do". There was no attempt made by Scholefield to make the Who's Who representative of New Zealand society. Scholefield edited the first five editions of this book. Frank Simpson edited the sixth edition. The next four editions were edited by George Petersen. Two further editions were published in 1978 and 1991, bringing the total number of editions to 12.