There were 31 more Covid-19 fatalities and 2,532 new cases registered during the previous 24 hours, the Public Health Ministry reported on Wednesday morning.
There were 2,484 cases in the general population and 48 among prison inmates.
This compared with 32 coronavirus-related fatalities and 2,476 new cases reported on Tuesday morning.
On Tuesday, 3,191 Covid-19 patients were discharged from hospitals after recovering from the coronavirus.
Since the pandemic started early last year, there have been 2,199,061 Covid-19 cases, with 2,139,388 complete recoveries so far.
The vast majority of the Covid cases and deaths have occurred since April 1, around when the third wave of Covid-19 began.
The death toll stood at 21,377 during the third wave and 21,471 since the beginning of the pandemic.
The kingdom's 24-hour high of Covid-19 fatalities was 312 recorded on Aug 13. The highest number of cases was 23,418 on Aug 13.
Sumanee Wacharasin, hazard communication director of the Department of Disease Control, said in the afternoon briefing that the 31 latest fatalities were between the ages of 38 and 97 years, and 20 (65%) were not vaccinated.
Bangkok reported three new deaths while two others were reported in the adjacent province of Samut Prakan.
Other central plain provinces further from the capital recorded six more deaths - in Kanchanaburi (2), Ang Thong (2), Rayong (1) and Suphan Buri (1).
The Northeast had three more fatalities - in Khon Kaen (2) and Sakon Nakhon (1).
The South reported 11 more deaths - Nakhon Si Thammarat (4), Trang (2), Satun (2), Chumphon (1), Pattani (1) and Phuket (1).
The North reported six fatalities - in Chiang Mai (2), Mae Hong Son (2), Chiang Rai (1) and Chai Nat (1).
The 2,532 new cases included 2,443 local infections and 41 imported cases.
Of the local infections, 2,393 were confirmed at hospitals and 50 via mass testing.
Bangkok had 421 new cases, followed by 150 in Chon Buri, 128 in Samut Prakan, 71 in Nakhon Si Thammarat, 70 each in Khon Kaen and Tak, 68 in Nakhon Sawan, 67 in Pattani and 58 each in Krabi and Mae Hong Son.
Dr Sumanee said there were 104 confirmed Omicron cases in the country, and some of them were already fully recovered and discharged from hospital.
The 41 imported cases were from Saudi Arabia (1), Denmark (3), France (6), the Netherlands (1), the United States (10), the United Kingdom (5), Qatar (1) Switzerland (1), Russia (2), Germany (2), Norway (3), Sweden (1), Japan (1), Canada (1), the Philippines (1), Laos (1) and Poland (1).
On Tuesday 38,202 people received Covid-19 treatment at hospitals, including 845 seriously ill patients and 231 dependent on ventilators. “The numbers are falling,” Dr Sumanee said.
Global Covid-19 cases rose by 745,639 in 24 hours to 276.58 million. The worldwide death toll went up by 7,114 to 5.38 million. The US had the most cases at 52.25 million, up 181,264, and the most deaths at 830,990, up 1,811.
Dr Sumanee said Omicron cases had been detected in at least 95 countries, including 47 states and Washington DC in the US. The new variant accounted for 73% of new Covid-19 cases in the US.