🗳️ Encuestas Electorales LatAm — Election Opinion Polls for Argentina, Brazil, Chile, Peru & more

Turn Wikipedia's opinion-polling tables into a clean, long-format dataset: one row per poll × candidate with pollster, fieldwork date, sample size, margin of error, candidate/party and %. Works with any "Opinion polling for the … election" page in English, Spanish or Portuguese Wikipedia — Argentina, Brazil, Chile, Peru, Colombia, Mexico, Uruguay…

Source: official MediaWiki API (no HTML scraping, no login). Content is © Wikipedia contributors under CC BY-SA 4.0; every row carries sourceUrl, revisionId and license so you can attribute and reproduce.

Input

• pages: list of page titles, optional language prefix (en:, es:, pt:). Default: Brazil 2026, Peru 2026, Chile 2025, Argentina 2023. Add the Argentina 2027 page as soon as Wikipedia creates it.
• maxPollsPerPage: default 15 (0 = all, can be thousands of rows) · sinceYear: e.g. 2026

Output

Example row (illustrative): {"page":"Opinion polling for the 2026 Brazilian presidential election","section":"Aug–Oct (Campaign period)","pollster":"Quaest","fieldworkDate":"2–4 Oct 2026","sampleSize":2004,"marginOfError":"2%","candidate":"Lula PT","percent":44,"isElectionResult":false,"sourceUrl":"…","revisionId":1380570709,"license":"CC BY-SA 4.0 (Wikipedia contributors)"}

Rows for actual election results (pollster "Results") are flagged with isElectionResult: true. Undecided/blank/"others" columns are skipped.

Use cases

Poll trackers and averages, newsroom charts, political research, prediction models, Google Sheets/Looker dashboards, AI agents. Schedule daily during campaigns.

Limitations

Wikipedia tables differ by page and are edited by volunteers; column detection is heuristic. Check section/tableIndex when a page has several scenarios (first round, runoff, etc.).

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🇪🇸 En español

Encuestas electorales de Argentina y Latinoamérica en un dataset limpio: encuestadora, fecha de campo, muestra, margen de error, candidato/partido y %, una fila por encuesta y candidato. Toma las tablas de "Opinion polling / Encuestas" de Wikipedia mediante su API oficial (licencia CC BY-SA 4.0, con atribución en cada fila). Ideal para promedios de encuestas, gráficos periodísticos, investigación y tableros. Programalo diario en campaña.

Data as-is from Wikipedia contributors (CC BY-SA 4.0). Not affiliated with any pollster.