EDIT: Scratch that, confused city limits of today with those of 1920
There were four in 1920:
- Toronto Railway Company, which served the older parts of Toronto
- Toronto Civic Railway, which served areas that Toronto annexed since 1921 and which the TRC refused to expand service to - St. Clair, Gerrard, Danforth, Lansdowne North, Bloor West.
- Toronto Suburban Railway - a strange motley of local street railways on Davenport and the Junction area, and a rural radial to Weston and Woodbridge, and a high-speed interuban to Guelph.
- Toronto and York Railway (in 1920 owned by Ontario Hydro) - three radial railway routes to West Hill, Port Credit, and Sutton via Newmarket.
By 1927, this was down to two (TTC and Canadian National Electric Railways which took over what was left of the TSR), by 1930, just the TTC (though it operated services technically owned by the Township of York).