Missouri voters face Aug. 4 primary and statewide income-tax ballot question
Missouri voters are scheduled to go to the polls Tuesday, Aug. 4, for the state’s 2026 primary election, where they will decide party nominations and confront a statewide income-tax proposal that a court allowed to remain on the ballot.
The election also arrives with Missouri’s congressional districts still a live legal and political issue. The Missouri Secretary of State’s office has said the state’s new congressional map remains in effect following a Missouri Supreme Court ruling, even as the map has been the subject of court litigation over its use in the 2026 elections.
No vote totals were available as of Aug. 3, the day before the scheduled statewide election.
Income-tax proposal remains before voters
The Secretary of State’s office reported that a court decision allowed an income-tax proposal to stay on the August ballot. That means the proposal will be presented to voters alongside the primary contests scheduled for Aug. 4.
The approved materials for this report do not provide the proposal’s exact ballot language, its fiscal estimate or a description of how it would change Missouri tax policy. As a result, the proposal should not be characterized as a tax increase, tax cut or revenue estimate based on the information available here.
What is confirmed is narrower: the court decision cited by the Secretary of State’s office left the income-tax proposal on the August ballot. Missouri voters will therefore make a statewide decision on that proposal during the scheduled primary election.
The ballot question gives the election significance beyond the selection of party nominees. The outcome could bear on state revenue policy, but the specific fiscal consequences cannot be determined from the materials provided because they do not include the ballot text or an official fiscal note.
Congressional map remains in effect
The Secretary of State’s office also said Missouri’s new congressional map, referred to in its news materials as the Missouri First congressional map, remained in effect after a Missouri Supreme Court ruling.
That status matters for congressional candidates and voters participating in the 2026 election cycle. The map is the districting plan that remains in effect under the ruling cited by the state election office.
The dispute over the map has not been merely political. Associated Press reporting in December 2025 described a lawsuit by voters seeking to suspend Missouri’s redrawn congressional map until a referendum. The reporting described competing legal arguments about whether the redrawn districts would apply in the 2026 elections and how the referendum process should operate.
The Secretary of State’s later statement establishes that the map remained in effect following the Supreme Court ruling. It does not establish that every possible future legal challenge has been resolved or that the map is permanently settled.
What is known before Election Day
Aug. 4 is a scheduled statewide voting date in Missouri. Voters will participate in a primary election while also seeing the income-tax proposal that survived the court challenge described by the Secretary of State’s office.
The primary and the ballot question involve separate decisions. Primary voters are deciding party nominations, while the income-tax proposal is a statewide measure. The congressional-map issue is separate from the tax question, but it remains relevant to the 2026 elections because the state has said the new map is in effect.
The next known step is the Aug. 4 election itself. Results and any election outcomes should not be treated as final before the appropriate certification process, and no winners should be reported based on the pre-election information available as of Aug. 3.
Sources
- News Releases, Missouri Secretary of State
- Voters sue to suspend Missouri’s new congressional map until a referendum, Associated Press