# Olivia Chow won Toronto mayoralty

*Politics. 48% certain. Thursday, 29 October 2026*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**Mark Sutcliffe secured Ottawa, while Frank Scarpitti was re-elected in Markham.**

On Tuesday, October 27, municipal voters in several Ontario cities chose new mayors. Olivia Chow defeated Brad Bradford to become mayor of Toronto. In the capital city, Mark Sutcliffe was re-elected as Ottawa's mayor, while Frank Scarpitti retained the mayoralty in Markham.

The same Tuesday saw Bonnie Crombie win the Mississauga Mayoral race over her challengers. Tito-Dante Marimpietri emerged victorious in Oshawa, defeating Jim Lee. Martin Ritsma secured the mayor's office in Stratford, and Erwin Wiens was elected mayor of Niagara-on-the-Lake. All of these contests concluded with the declared winners on October 27.

The following day, Wednesday, October 28, the Huon Valley electorate chose Abby McKibben as mayor. Both results were announced after the close of voting in their respective municipalities.

The election results were announced on October 27 for eight municipalities. Winnipeg's Mayoral outcome was released on October 29. Huon Valley's result came a day earlier on October 28. The three-day span covered all of the October municipal contests.

Scott Gillingham's victory in Winnipeg completed the October municipal election announcements. The newly declared mayors are Olivia Chow in Toronto, Mark Sutcliffe in Ottawa, Tito-Dante Marimpietri in Oshawa, Bonnie Crombie in Mississauga, Frank Scarpitti in Markham, Martin Ritsma in Stratford, Erwin Wiens in Niagara-on-the-Lake, and Abby McKibben in Huon Valley. Their names were confirmed on the dates recorded for each municipality.

## Analysis

With major urban centres such as Toronto and Ottawa now under new or reaffirmed mayors, priorities ranging from transit to housing are likely to be revisited under different administrative styles.

In Ontario, the mix of incumbents retaining office and newcomers gaining it creates a dynamic environment for regional collaboration. Shared challenges such as infrastructure funding and climate resilience may prompt joint initiatives, but differing political orientations could also lead to varied approaches among the cities.

The inclusion of Winnipeg and Huon Valley expands the provincial scope of the election wave, highlighting how municipal outcomes can differ across Canada's jurisdictions. While the western and eastern municipalities share the common process of electing mayors, their policy contexts and relationships with provincial governments may diverge, affecting how they respond to broader national issues.

Uncertainty remains regarding how each new mayor will navigate fiscal constraints, provincial-municipal negotiations, and the expectations of their constituents. The upcoming council sessions will reveal how these leaders translate electoral victories into concrete actions, and whether the wave of October results will produce coordinated policy shifts or a patchwork of local strategies.

### Background consulted for the analysis

- [Markham, ON Mayoral Election Winner Odds: Frank Scarpitti 97% | Polymarket Odds Today](https://polymarkettrader.com/odds/markham-mayoral-election-winner/)
- [2026 Markham Municipal Election | City of Markham](https://www.markham.ca/elections)
- [2026 York Region municipal elections - Wikipedia](https://en.wikipedia.org/wiki/2026_York_Region_municipal_elections)
- [Voter Information Letters for the 2026 Markham Municipal Election are in the mail | City of Markham](https://www.markham.ca/about-city-markham/news/news-releases/voter-information-letters-the-2026-markham-municipal-election-are-the-mail)

## What this was built from

- **Toronto Mayoral Election Winner**: Olivia Chow, 51%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/toronto-mayoral-election-winner-545)
- **Ottawa Mayoral Election Winner**: Mark Sutcliffe, 84%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/ottawa-mayoral-election-winner)
- **Oshawa, ON Mayoral Election Winner**: Tito-Dante Marimpietri, 95%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/oshawa-mayoral-election-winner)
- **Mississauga Mayoral Election Winner**: Bonnie Crombie, 48%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/mississauga-mayoral-election-winner)
- **Winnipeg Mayoral Election**: Scott Gillingham, 97%; settles Thursday, 29 October 2026 (polymarket). [Market](https://polymarket.com/event/winnipeg-mayoral-election-2026)
- **Markham, ON Mayoral Election Winner**: Frank Scarpitti, 98%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/markham-mayoral-election-winner)
- **Stratford, ON Mayoral Election Winner**: Martin Ritsma, 79%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/stratford-ontario-mayoral-election-winner)
- **Niagara-on-the-Lake, ON Mayoral Election Winner**: Erwin Wiens, 63%; settles Tuesday, 27 October 2026 (polymarket). [Market](https://polymarket.com/event/niagara-on-the-lake-mayoral-election-winner)
- **Huon Valley Mayoral Election Winner**: Abby McKibben, 63%; settles Wednesday, 28 October 2026 (polymarket). [Market](https://polymarket.com/event/huon-valley-mayoral-election-winner-2026)