HCMC led with 1,675 cases, followed by two other southern localities: Can Tho (989 cases) and Soc Trang (757 cases).
Hanoi saw 467 new cases.
Except for the days when prior number cases were added to the data base, this is the second highest single-day record behind Sep. 3 with 14,894 cases.
196 deaths were confirmed, with 68 in HCMC, bringing the national tally to 25,448 since the beginning of the pandemic, or 2 percent of total number of infections.
2,704 cases were discharged Wednesday, bringing the total in the fourth Covid-19 wave to 992,052.
53.6 percent of the population have received two vaccine doses.