**Zacatecas state congress elections in 2027 feature a fragmented field where no single party holds a clear edge.** Recent October 2026 polls for the concurrent gubernatorial race show Movimiento Ciudadano candidates leading in some scenarios with around 30% support, followed closely by PAN-PRI alliance figures near 25% and Morena-PT-PVEM at 22%, reflecting voter desire for change (56% favor a different governing party) and notable rejection of Morena (29%). Opposition realignments, including leadership shifts and cross-party incorporations, alongside Morena's internal candidate debates, sustain the tight contest. Mixed-member proportional representation for the 30 seats, combined with district outcomes and potential coalitions, keeps probabilities balanced, with developments in candidate finalization and alliance formalization likely to influence seat distribution ahead of the vote.