There were 30 more Covid-19 fatalities and 3,129 new cases in the country over the past 24 hours, the Public Health Ministry reported on Thursday.
There were 2,672 cases in the general population and 457 among prison inmates.
Over the past 24 hours, 4,651 Covid-19 patients were diagnosed recovered and were discharged from hospitals.
Since April 1, around when the third wave of Covid-19 began, there have been 178,861 Covid-19 patients, 144,890 of whom have recovered.
Since the pandemic started early last year, there have been 207,724 Covid-19 cases, 172,316 of whom recovered.
The death toll was at 1,461 in the third wave and 1,555 from the beginning of the pandemic early last year.
Apisamai Srirangson, spokeswoman for the Centre for Covid-19 Situation Administration (CCSA), said later in the afternoon briefing that the 30 new fatalities were aged 38-89 years. Eighteen were men and 12 women. A Myanmar national and a Kuwaiti were among them.
Ten of those who died caught the disease from colleagues, neighbours, other patients at hospitals or maids. Nine caught the virus from other family members.
Twenty-two deaths were in Bangkok, three in Phetchaburi and one each in Samut Prakan, Samut Songkhram, Udon Thani, Sa Kaeo and Narathiwat.
The 3,129 new cases over the past 24 hours included 2,649 local infections in 61 provinces and 23 imported cases. Of the local infections, 1,991 cases were confirmed at hospitals and 658 via mass testing.
Bangkok logged the most, 1,032 cases, followed by 390 in Samut Prakan, 171 in Samut Sakhon, 130 in Nakhon Pathom, 105 in Nonthaburi, 75 in Chon Buri, 71 in Pathum Thani, 67 in Narathiwat, 58 in Pattani and 43 in Ayutthaya.
"New cases in Bangkok had been at three digits a day since June 11, but the number was four figures on June 17. This deserves precautions,” Dr Apisamai said.
There were 83 Covid-19 clusters in the capital. A new cluster of 37 cases was confirmed at the Naval Supply School in Bang Na district on Wednesday.
Samut Prakan province had two new clusters – 154 cases at a furniture company in Muang district and 30 cases at a garment company in Phra Pradaeng district.
"CCSA is concerned about Samut Prakan because there are new clusters there every day,” Dr Apisamai said.
Samut Sakhon confirmed a new cluster of 11 cases at a fresh seafood plant in Muang district. The 23 imported cases were from Cambodia, including 10 illegal returnees and an illegal Cambodian migrant.
As of Wednesday, 33,853 people were receiving Covid-19 treatment at hospitals, with 1,313 critically ill and 376 dependent on ventilators.
Global Covid-19 cases rose by 396,623 in 24 hours to 177.78 million. The worldwide death toll went up by 9,441 to 3.85 million. The United States had the most cases at 34.36 million, up 14,063.