Hungarian Brazilian (Portuguese: húngaro-brasileiro or magiar-brasileiro) is a Brazilian person of full, partial, or predominantly Hungarian ancestry, or a Hungarian-born person residing in Brazil.

Although ethnic Hungarians live in all the countries of South America, active community life and organizations exist only in Brazil, Argentina, Chile, Venezuela, and Uruguay. Even though official census data are not available, according to greatly varying local estimates, 850,000 to 1,000,000 Brazilians are of Hungarian descent. In the case of Argentina and Brazil, the discrepancy between estimates may originate from the fact that the Hungarian diasporas in those two countries can look back to one-and-half century of history, and the fact that the ethnic identity of the non-first generation population of Hungarian origin is already vague in many cases. In terms of organization and social cohesion, the strongest Hungarian communities are those in Brazil and Argentina.

According to the data received from the local Hungarian communities, the number of grandparents and parents who immigrated from Hungary to Brazil is between 33,000 and 65,000. Their descendants already born in the country and who still record their Hungarian origin may number some 145,000 to 310,000.