**Vicentinho Júnior (PSDB) leads the Polymarket for Tocantins governor at 62.5% implied probability ahead of the October 25 runoff, while Professora Dorinha (União) sits at 35.5%.** The first-round results on October 4 produced a razor-thin contest, with Dorinha at 45.52% and Vicentinho at 43.94% of valid votes; no candidate reached an absolute majority, advancing the top two. Both candidates quickly shifted to alliance-building, with Vicentinho emphasizing outreach to non-supporters and Dorinha consolidating support from the current state administration and federal figures. Historical precedent in Tocantins shows first-round leaders prevailing in runoffs, yet trader pricing reflects assessments of coalition momentum, vote consolidation potential among eliminated candidates such as Laurez Moreira (PSD), and campaign dynamics in the final weeks. The low probabilities for other listed names align with their first-round shares below 9%.