Incumbent Dorothy McCabe holds the strongest position in the October 26, 2026, Waterloo mayoral race, backed by name recognition, established campaign infrastructure, and the typical advantages of incumbency in Ontario municipal elections. Traders assign her the clearest lead at 68.5 percent, reflecting limited polling shifts and the absence of major controversies that might erode support. Shannon Weber, the primary challenger who narrowly lost in 2022, sits at 18.1 percent amid ongoing focus on tax increases and housing costs during the October 5 all-candidates debate. The remaining candidates, including Jeyas Balaskanthan, Jamie Hari, and Jerry Jiang, register minimal implied probabilities consistent with late entry, lower visibility, and historical patterns where challengers rarely unseat sitting mayors without broad voter dissatisfaction. Advanced voting periods beginning October 10 provide the next measurable indicator ahead of election day.