✓ verbatim from the press
Seven thousand four hundred people attended the 18th Cannabis March in São Paulo on Sunday, June 21, 2026, according to the USP/CEBRAP Political Debate Monitor in partnership with the NGO More in Common. The figure — with a 12% margin of error, indicating between 6.5 thousand and 8.3 thousand participants at 4 p.m., peak time — was obtained through aerial drone photos analyzed with artificial intelligence software that identifies and counts heads. ✓
Press quotes (2)
"A edição de 2026 da Marcha da Maconha, realizada neste domingo 21 em São Paulo, reuniu cerca de 7,4 mil pessoas, segundo o Monitor do Debate Político USP/CEBRAP em parceria com a ONG More in Common. O monitoramento tem margem de erro de 12%, o que indica que havia entre 6,5 mil e 8,3 mil participantes às 16h, horário de pico da mobilização."
"A contagem se baseia em fotos aéreas analisadas com um software de inteligência artificial."
The count contrasts with Correio do Povo's report published the same day, which opened with the claim that "dozens of thousands of people" attended, without citing a source, methodology, or attribution for the number. The Rio Grande do Sul newspaper did not indicate whether the estimate came from organizers, police, or its own observation. ✓
Press quotes (1)
"Dezenas de milhares de pessoas se reuniram, na tarde deste domingo, em um protesto pela legalização da maconha no país."
The March began in front of MASP, on Avenida Paulista. Participants called for cannabis legalization and criticized the effects of the plant's criminalization. According to Correio do Povo, the profile of demonstrators was diverse, including elderly people, families with children, and young adults. Elementary school teacher Stephanie Oliveira told the newspaper that her 47-year-old mother uses medical cannabis to regulate sleep and relieve back pain. ✓
Press quotes (2)
"Em frente ao Museu de Arte de São Paulo Assis Chateaubriand (Masp), os manifestantes criticaram os efeitos da criminalização da planta."
"O perfil dos participantes da marcha era diverso, contando com idosos, pais e mães com seus filhos e jovens adultos. A professora de educação infantil Stephanie Oliveira participou da mobilização pela primeira vez, acompanhada do namorado. Ela contou que sua mãe, de 47 anos, usa cannabis medicinal para regular o sono e aliviar dores nas costas."
According to the Kaya Mind yearbook cited by Correio do Povo, 50 thousand people in Brazil currently declare they are treating themselves with cannabis sativa-based products. The publication highlights that the lack of acceptance of the plant by a large portion of society hinders regulation, and that only people with high purchasing power can import cannabis products. ✓
Press quotes (2)
"De acordo com o anuário da Kaya Mind, principal organização brasileira voltada à sistematização e divulgação de dados nacionais sobre o segmento, atualmente 50 mil pessoas no país declaram se tratar com produtos à base da cannabis sativa."
"A publicação, lançada com financiamento da Gravital Clínica Canábica e da Cannect, destaca que a falta de aceitação da planta por grande parcela da sociedade atrapalha a regulamentação. Diante dessa resistência, as discussões não avançam e apenas pessoas com alto poder aquisitivo conseguem importar itens canábicos."
The 18th Cannabis March took place in São Paulo on Sunday, June 21, 2026, with a gathering in front of MASP, on Avenida Paulista.
Demonstrators called for cannabis legalization and criticized the effects of the plant's criminalization.
Covered by only some sources, or where the accounts diverge.
Covered by only some sources (3)
CartaCapital detailed the methodology of the USP/CEBRAP Political Debate Monitor: aerial photos at seven times (2:20 p.m., 2:40 p.m., 3 p.m., 3:20 p.m., 4 p.m., 4:30 p.m. and 4:45 p.m.), selection of seven images at 4 p.m. covering the entire extension without overlap, AI analysis that automatically identifies and marks heads.
Correio do Povo interviewed elementary school teacher Stephanie Oliveira, who participated for the first time, reported medical cannabis use by her 47-year-old mother, and mentioned hesitation to post photos of the march on social media due to fear of reaction from coworkers.
Correio do Povo cites the Kaya Mind yearbook (funded by Gravital Clínica Canábica and Cannect), which points to 50 thousand people in Brazil treating themselves with cannabis-based products and criticizes social resistance to regulation that limits access to those with high purchasing power.
Conflicting versions (1)
Crowd estimate for the 18th Cannabis March in São Paulo (June 21, 2026)
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What was the source or methodology used by Correio do Povo to estimate "dozens of thousands" of participants in the Cannabis March?
Why it's still unknown: Correio do Povo's article does not cite a source (organizers, police, or own count) or methodology for the estimate. Attempts to retrieve additional information via web archive returned no results; direct contact with the newsroom (editors Paulo Mendes and Telmo Flor) is outside the scope of available tools.
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Did the organizers of the Cannabis March issue an official crowd estimate?
Why it's still unknown: Neither of the two consulted outlets cites a statement from organizers about the size of the demonstration. CartaCapital reported only the academic count from USP/CEBRAP; Correio do Povo did not attribute its estimate to any source.
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Did the São Paulo Military Police conduct a crowd count or issue an official estimate?
Why it's still unknown: Neither article mentions a statement or count from the PM-SP.
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What is the historical attendance record for previous editions of the Cannabis March in São Paulo (2023–2025)?
Why it's still unknown: The articles do not provide a historical series of participation, which would prevent assessing whether 7.4 thousand represents growth, stability, or decline compared to previous years.