Dorothy McCabe, the incumbent mayor first elected in 2022, holds a commanding position in the October 26, 2026 Waterloo mayoral race due to her early nomination filing in May, established record on housing affordability, transit advocacy, and securing a new hospital project, plus her role on regional and provincial bodies. Multiple challengers including Shannon Weber, Jeyas Balaskanthan, Jamie Hari, and Jerry Jiang filed on or near the August 21 deadline, yet none have generated notable momentum or polling visibility to date. Traders reflect this through implied probabilities favoring continuity, consistent with historical patterns where sitting mayors in Ontario municipal contests often secure re-election absent major controversies. Late developments such as shifts in local economic conditions, turnout among key voter blocs, or unexpected campaign events within the final weeks could still alter outcomes before election day.