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Partial researchResearch snapshot 2026-09-13. Evidence gaps remain; see Coverage for requirements.

Office briefing

Rio de Janeiro — Governor

Tracked current office. Identifiers stay separate from display names.

Brazil · Rio de Janeiro / RJ · regional · GovernorBR-RJ-G

Read the complete original research briefing

First round 4 October 2026; governor runoff 25 October where required. TSE ordinary-election returns aggregated once from state files, excluding the duplicate national BR file. Party votes are not governing coalition control. Legislative votes include nominal plus valid list votes. Judicial retotalizations and changed party labels require review. The 2014 file uses legacy nominal/list fields; later files separately identify valid, converted and subjudice votes. This is an explicit definition-comparability limitation. TSE’s 2 June 2026 decision maintains Castro’s ineligibility but reports no majority to add cassation of the governor/vice diplomas; their prior resignations and the ordered replacement must not be collapsed into an asserted annulment of all 2022 governor votes. The recovered 31 March official report retains 8,400,962 valid governor votes. Replacement format, final selection and current control remain separately unresolved.

1. What office, where, and when is the next election?

Geography
Rio de Janeiro / RJ
Next election
2026-10-04
Linked upcoming event
next-33e7e8b4ef0a99d0236d761f
Registry qualification
Unknown

2. How certain is that date?

2026-10-04 is expected (not formally called). Day precision. A date without a formal call is not confirmed.

3. Who won earlier selected elections?

2022-10-02

unknown · Legal certification not established · unknown

  • PL58.7%
  • PSB27.4%
  • PDT8.0%
  • NOVO5.3%
  • UP0.3%
  • PSTU0.2%
  • PCB0.1%
Results for event-cee2b49a5436331caaea5ac0
Label / candidateParty codeVotesShareSeatsStatus
PL · CLÁUDIO CASTRObrazil/S5cd0a4c40e/20224,930,28858.7%UnknownRecorded
PSB · MARCELO FREIXObrazil/S5cd0a4c40e/20222,300,98027.4%UnknownRecorded
PDT · RODRIGO NEVESbrazil/S5cd0a4c40e/2022672,2918%UnknownRecorded
NOVO · PAULO GANIME brazil/S5cd0a4c40e/2022446,5805.3%UnknownRecorded
UP · JULIETEbrazil/S5cd0a4c40e/202227,3440.3%UnknownRecorded
PSTU · CYRO GARCIAbrazil/S5cd0a4c40e/202212,6270.2%UnknownRecorded
PCB · EDUARDO SERRAbrazil/S5cd0a4c40e/202210,8520.1%UnknownRecorded

2018-10-28

unknown · Legal certification not established · unknown

  • PSC59.9%
  • DEM40.1%
Results for event-297027bd6ca1d7a3b58cb6a1
Label / candidateParty codeVotesShareSeatsStatus
PSC · WILSON WITZELbrazil/S0d7ac4a666/20184,675,35559.9%UnknownRecorded
DEM · EDUARDO PAESbrazil/S0d7ac4a666/20183,134,40040.1%UnknownRecorded

2014-10-26

unknown · Legal certification not established · list votes

  • PMDB55.8%
  • PRB44.2%
Results for event-99ae83c9a54cc55a2216c29f
Label / candidateParty codeVotesShareSeatsStatus
PMDB · LUIZ FERNANDO PEZÃObrazil/S2c70216745/20144,343,29855.8%UnknownRecorded
PRB · MARCELO CRIVELLAbrazil/S2c70216745/20143,442,71344.2%UnknownRecorded

4. Competition and volatility

competition index

Provisional imported-series CI

0 (recorded zero)0–100 historical closeness

Actual-event and/or comparability review incomplete

Comparison status: Provisional imported-series comparison; actual-event review open

Method ci.weighted-gap.v1. Inputs: latest_gap=31.297701382294076, oldest_gap=11.56670598076473, previous_gap=19.731156739231892

pedersen volatility

Withheld volatility

Unknownpercentage points

Not calculated: comparable fixed party grouping unavailable

Comparison status: Latest interval · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=[], interval=Latest interval, vectors=[]

pedersen volatility

Withheld volatility

Unknownpercentage points

Not calculated: comparable fixed party grouping unavailable

Comparison status: Previous interval · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=[], interval=Previous interval, vectors=[]

pedersen volatility

Withheld volatility

Unknownpercentage points

Not calculated: comparable fixed party grouping unavailable

Comparison status: Both intervals mean · Comparable grouped vectors unavailable for this interval

Method pedersen.grouped.v1. Inputs: groups=[], interval=Both intervals mean, vectors=[]

Source-reported control: Ricardo Couto (interino) (Político sem partido); Secondary current-directory snapshot; primary incumbent/party verification pending; retrieved 12 Sep 2026. Secondary current-directory snapshot; primary incumbent/party verification pending

5. Officeholder evidence

Dated roster observations are not automatically current tenure. The source current-office flag means this office is tracked now, not that the last winner still holds it.

No officeholder observation supplied.

6. Polling context

  • Datafolha

    vote intention · fieldwork 2026-09-08–2026-09-11

    Poll snapshot; no calibrated win probability or automatic incumbent-defeat flag

National context is listed on the polling page. It is not a local forecast.

7. Unresolved issues and sources

First round 4 October 2026; governor runoff 25 October where required. TSE ordinary-election returns aggregated once from state files, excluding the duplicate national BR file. Party votes are not governing coalition control. Legislative votes include nominal plus valid list votes. Judicial retotalizations and changed party labels require review. The 2014 file uses legacy nominal/list fields; later files separately identify valid, converted and subjudice votes. This is an explicit definition-comparability limitation. TSE’s 2 June 2026 decision maintains Castro’s ineligibility but reports no majority to add cassation of the governor/vice diplomas; their prior resignations and the ordered replacement must not be collapsed into an asserted annulment of all 2022 governor votes. The recovered 31 March official report retains 8,400,962 valid governor votes. Replacement format, final selection and current control remain separately unresolved. Roraima legal certification, Rio and other specific replacement/current-control cases remain open. Eight municipal replacement tickets are tracked; ordinary municipal renewals are outside the window. Public-vote baselines for Alagoas and Amazonas are supplied separately from their indirect selections. Roraima’s primary 2010 cycle is recovered; the June 2026 proclamation is still unresolved. Rio’s signed 2026 legislative retotalization verifies the imported 2022 votes and seats, with 70 named elected deputies added; later membership and governing-coalition control still need dated verification.

    Sources

    Cite this record

    Center for Digital Democracy. “Rio de Janeiro — Governor.” Subnational Election Observatory, releaselatin-america-fe5e91689def, snapshot 2026-09-13. /electiondatabase/offices/BR-RJ-G. Sources: brazil--url-580aebec6bb5c27e76b98bb4, brazil--url-ef95aa16df1e62f699a27949, brazil--url-653ade48bf64a7388c4b910b, brazil--S5cd0a4c40e, brazil--S0d7ac4a666, brazil--S2c70216745, brazil--url-6118e6e70b4e186f7d77dc7c.