The genteel agricultural town of Windsor was chosen by Charles Inglis, first overseas Bishop of the Anglican Church, over the larger military centre and colonial capital of Halifax (60 km to the southeast) so "...that it be well away from taverns and houses of ill fame,".
In June 1890, the Anglican Diocese of Nova Scotia decided to establish a girl's school in Windsor to complement King's Collegiate School. The Edgehill School opened in January 1891 and a new building began construction on the campus to house the institution the following June 23.
In 1923 a disastrous fire swept through the Windsor campus, causing irreparable damage to the main university buildings. With the encouragement of the Carnegie Foundation, which was promoting the consolidation of all Nova Scotian post-secondary institutions to Halifax around a nucleus formed by Dalhousie University, the University of King's College received funding to move into a newly built campus in Halifax. King's College remains an independent university, although its students enjoy affiliation privileges with Dalhousie. Its campus is located at the corner of Oxford Street and Cobourg Road, occupying the northwest corner of Dalhousie's Studley Campus.
Both King's Collegiate School and the newer Edgehill School remained on the Windsor campus and eventually expanded to include much of the 65-acre site. In 1976 the governing bodies of both schools decided to amalgamate, using the present-day name King's-Edgehill School.