The Railways are generally divided into two grand divisions, viz:
EASTERN—6,828.0 miles; embracing all lines situated east of Armstrong, Ont., and Port Arthur, Ont., and extending to the Atlantic Coast, including Prince Edward Island. In charge of a General Manager whose office is at Montreal, Que.
WESTERN—10,030.4 miles; embracing all lines Armstrong, Ont., and Port Arthur, Ont., and west to the Pacific Coast, including those on Vancouver Island and the Duluth Winnipeg and Pacific Railway. In charge of a General Manager whose office is at Winnipeg, Man.
Eastern Lines are again subdivided into three General Superintendents’ Districts, viz:
| District | Located | Headquarters at | Miles |
| Maritime | Principally in Maritime Provinces | Moncton, N.B. | 2671.3 |
| Quebec | Principally in Quebec | Quebec City | 2356.1 |
| Ontario | All in Ontario | Toronto, Ont. | 1800.6 |
Western Lines are subdivided into four General Superintendents’ Districts, viz:
| District | Located | Headquarters at | Miles |
| Central | Principally in Manitoba (including Duluth, Winnipeg and Pacific Railway lines in Minnesota 172.6 miles). | Winnipeg, Man. | 3156.6 |
| Prairie | Principally in Saskatchewan | Saskatoon, Sask. | 3181.8 |
| Western | Principally in Alberta | Edmonton, Alta. | 2162.5 |
| Pacific | Principally in British Columbia | Vancouver, B.C. | 1529.5 |
Note—In the Pacific District, an Assistant General Manager is in charge instead of a General Superintendent, on account of its remoteness from General Manager’s headquarters.
General Superintendents’ Districts are again subdivided into Superintendents’ Divisions, each averaging approximately five hundred miles.