Roman Zarzycký holds a commanding 96.4% implied probability in the Polymarket for Plzeň’s next mayor following the October 9–10, 2026 municipal elections, in which his ANO movement secured a clear victory with 31.69% of the vote and 18 seats in the 47-member assembly. Traders price in his incumbency since 2022, ANO’s strengthened position, and the rapid formation of a stable majority coalition with STAN and Pro Plzeň (with support from KDU-ČSL), which controls 34 seats and confirmed his continued leadership on October 11. The agreement allocates ANO five of nine council seats and key portfolios while naming STAN’s Aleš Tolar as first deputy. Low probabilities for challengers such as Tomáš Morávek, Lukáš Hegner, and others reflect the fragmented opposition and absence of viable alternative coalitions. Late developments that could still alter the outcome include coalition fractures, health events, or legal issues before the new council formally installs the mayor.