In an extraordinary session, MPs confirmed Thuong, 52, after the ruling Communist Party nominated him on Wednesday as president, a largely ceremonial role but one of the top four political positions in the Southeast Asian nation.

Thuong's election on Thursday follows the sudden resignation in January of his predecessor Nguyen Xuan Phuc, who the party blamed for "violations and wrongdoing" by officials under his control, in what was seen as a major escalation of the country's "blazing furnace" anti-corruption crackdown.

In his first speech as new president, Thuong said he would "resolutely" continue the fight against corruption.

"I will be absolutely loyal to the fatherland, the people and the constitution, striving to fulfill the tasks assigned by the party, the state and the people," Thuong said in a statement broadcast on Vietnam's state television.

Thuong is the youngest member of the party's politburo, the country's top decision-making body, and is considered a veteran of the party having begun his political career at university in communist youth organisations.

He is widely regarded as being close to General Secretary Nguyen Phu Trong, Vietnam's most powerful figure and the main architect of the party's battle against corruption.

Diplomats and businesspeople have raised concerns about the anti-graft campaign because it has paralysed many routine transactions in Vietnam as officials fear being entangled in the crackdown.

A Hanoi-based diplomat said Thuong's election was a major step by General Secretary Trong amid jockeying to succeed him, given the 78-year-old leader might step down before the end of his third term in 2026.

Thuong was elected with 98.38 per cent of the votes, according to the parliament's online portal.

Australian Associated Press