Most of Brazil Lies in the Tropics

Yes. The vast majority of Brazil's territory (and population) is located within the tropics.

Geographic Facts

• Equator crosses the far north (through Amazonas, Pará, Roraima, Amapá).
• Tropic of Capricorn (23.5°S) cuts through São Paulo, Paraná, Mato Grosso do Sul.
• ~90% of Brazil's land area lies between the Equator and the Tropic of Capricorn — the tropical zone.
• Only the southernmost states (Rio Grande do Sul, Santa Catarina, southern Paraná, southern Mato Grosso do Sul) extend into the subtropical/temperate zone.

Climate Implications

• Tropical climates dominate: Amazon (Af), Cerrado (Aw), Caatinga (BSh), Atlantic Forest (Am/Aw).
• No winter (astronomical) for most of the country — seasons are wet/dry.
• Agriculture: Multiple harvests/year (soy, corn, cotton, sugarcane, coffee, citrus).
• Biodiversity: Highest on Earth (Amazon, Atlantic Forest, Pantanal, Cerrado).

Population

• ~215M people; ~85% live in tropical zone.
• Major cities in tropics: São Paulo (23.5°S — just south of Tropic), Rio de Janeiro (22.9°S), Brasília (15.8°S), Salvador (12.9°S), Fortaleza (3.7°S), Manaus (3.1°S), Belém (1.4°S).
• Subtropical cities: Porto Alegre (30°S), Curitiba (25.4°S), Florianópolis (27.6°S).

Brazil is the largest tropical country by area and population — a defining feature of its ecology, economy, and culture.