Techny is a neighborhood of Northbrook, Illinois, United States.
Once a separate community, it was annexed by Northbrook in 1989. The North American headquarters of the Divine Word Missionaries has been located in Techny since 1896. The area's name derived from St. Joseph's Technical School, which the religious congregation established in 1901 and operated for twelve years.St. Mary's Mission Seminary, the first of its kind which prepared priests and Brothers for foreign missions, was opened by the Divine Word Missionaries in 1909.