The capital city of Hanoi again topped the list with 2,955 new cases, followed by Da Nang city with 924 and Hung Yen province with 675.
The number of Omicron infections remained the same as on the previous day at 68, all imported and quarantined upon arrival.
The national caseload now stands at 2,045,290. In the past week, the country saw an average of 16,155 new infections daily.
The total number of COVID-related fatalities in the country is now 35,788, or 1.7% of the total infections.
A further 20,172 patients were given the all-clear on Monday, taking the total number of recoveries to 1,747,462.
Nearly 169 million doses of COVID-19 vaccine have been administered in the country to date.