The Campeonato Brasileiro Série D (English: Brazilian Championship Serie D), commonly known as the Série D or the Brazilian Série D to distinguish it from the Italian Serie D, is the fourth division of the Brazilian football league system, and was announced by the Brazilian Football Confederation (CBF) on 9 April 2008. The Campeonato Brasileiro Série D was formed from the split of the Série C, keeping its best 20 clubs and playing double round robin as does the top three divisions. The Série D keeps the same format of the older Série C, but with participation limited to 40 clubs recognized by the state federation. In 2016 the Série D was expanded to 68 clubs, but in 2022 it was reduced to 64 clubs.

The Série D format is a mixed system: the 64 clubs are divided in 8 groups organized regionally, playing in a round-robin format. The top teams qualify for playoffs and clubs that reach the semi-finals are promoted to Série C. Clubs qualify for the Série D by their performance at state championships — spots are given to the top clubs on those leagues that aren't at Série A, B or C — at state cups or relegation from Série C.

The Brazil Serie D is the fourth tier of professional football in Brazil, serving as a crucial platform for clubs aiming to ascend the ranks of the Brazilian football league system. Established in 2014, Serie D features a diverse array of teams from across the country, including both well-known clubs and smaller, regional sides.

The tournament typically runs from May to December, with teams competing in a series of group stages followed by knockout rounds. The format allows for intense competition, as clubs vie for promotion to the Serie C, the next level up. Each season, the top teams from the tournament earn the opportunity to advance, making Serie D a vital stepping stone for clubs looking to establish themselves in Brazilian football.

The tournament is characterized by its passionate fan base, with local supporters rallying behind their teams in stadiums filled with vibrant energy. The Serie D not only showcases emerging talent but also highlights the rich football culture of Brazil, where the love for the game transcends regional boundaries.

As clubs battle for glory, the Brazil Serie D remains a testament to the spirit of competition and the pursuit of excellence in Brazilian football, offering thrilling matches and unforgettable moments for players and fans alike.