Toronto's subway system has grown to 109 stations and 99.4 kilometres of route, according to the Wikipedia article on the Toronto subway, capping a stretch of expansion that added two new lines in barely two months.
Line 5 Eglinton, a 19-kilometre light rail line running along Eglinton Avenue from Mount Dennis station in the west to Kennedy station in the east, opened for passenger service on February 8, 2026, at a cost of approximately $12 billion.
It was the second new line in quick succession. Line 6 Finch West, a surface light rail line running in the median of Finch Avenue from Finch West station to Humber College, opened on December 7, 2025, after construction began in 2019.
Canada's busiest rapid transit system
The system, operated by the Toronto Transit Commission, carried 331,789,000 riders in 2025, and averaged about 1,087,000 riders per weekday as of the second quarter of 2026 — making it the busiest rapid transit network in Canada by daily ridership.
The network now consists of five lines: Line 1 Yonge–University, Line 2 Bloor–Danforth, Line 4 Sheppard, Line 5 Eglinton and Line 6 Finch West. Line 1 remains the longest and busiest, stretching 38.8 kilometres in a U-shaped route with northern terminals at Vaughan Metropolitan Centre and Finch, and its southern end at Union Station downtown.
The TTC's history with rapid transit dates to 1954, when it opened Canada's first subway under Yonge Street between Union Station and Eglinton Avenue with 12 stations. That original 7.4-kilometre line has since been extended repeatedly, including the 2017 opening of the segment to Vaughan Metropolitan Centre.
More construction underway
As of May 2026, 26 stations were under construction as part of the Ontario Line and three extensions to existing lines.
The Ontario Line, a 15.6-kilometre subway running from Exhibition station to Don Valley station, would provide a second rapid transit line through the Financial District and downtown core. It is scheduled for completion in 2031 at a cost of $17 to $19 billion, and is expected to take on the Line 3 name once it opens — a moniker left vacant when the Scarborough RT was shut down in July 2023 after a derailment.
The Line 2 Bloor–Danforth extension northeast from Kennedy station to Sheppard Avenue and McCowan Road via Scarborough City Centre, which began construction in 2021, is also planned to open in the 2030s. Bus service has replaced the old Line 3 and is scheduled to continue until that extension opens.
Line 1's northern extension to Richmond Hill is being procured, with five new stations and a planned opening in the 2030s. Line 5's western extension to Renforth station — 9.2 kilometres with seven stations — began construction in 2022 and is likewise scheduled for completion in the 2030s.
Line 5's opening ended a long wait for Eglinton Avenue residents. Construction began in 2011, and the project — funded by Metrolinx — faced numerous delays before the Ontario government announced substantial completion on December 5, 2025, and the TTC set the February opening date.
The line has 25 stopping points, 15 of them underground stations, with the remaining 10 at-grade stops in the road's median. It averages 28 km/h, compared with 32 km/h on Line 2.
