Otto Halfdan Treider (October 6, 1856 – April 6, 1928) was a Norwegian educator and preacher.[1]
Treider was born in Drøbak.[1] He founded the Otto Treider Business School (Otto Treiders handelsskole, now Treider College) in 1882.[1][2] The institution soon became Norway's largest and leading business school.
As a preacher, Treider supported the Free Church movement[3] and led a group known as the Treider Circle.[4] In 1891 he built the Calmeyer Street Mission House in Oslo.[1][5]
Treider died in Oslo.[1]