You were born in Brazil and became us citizen do you need a visa to go to Brazil?

= Brazil Visa Application Service
All US Citizens and many foreign nationals who travel to Brazil require an entry visa prior to leaving the US. Using our Brazilian visa service, we can obtain your Brazil visa in time for your trip! =
No. The brazillian consulate will issue you a Brazillizn passport with proof you were born there. If you want to travel there using your U.S. passport then you will require a visa.