The country registered 26,840 more Covid-19 cases and 97 new fatalities during the previous 24 hours, the Public Health Ministry announced on Sunday morning.
This compared with the 96 coronavirus-related fatalities and 28,029 new cases reported on Saturday morning.
There were 26,800 local cases and 40 imported cases.
On Saturday, 23,412 Covid-19 patients were discharged from hospitals after recovering from the coronavirus.
The Centre for Covid-19 Situation Administration said on Sunday afternoon that the latest 97 fatalities were between the ages of four and 100 years and included two foreigners, from Myanmar and China.
Bangkok continued to log the most new deaths, with 18, followed by six each in Chon Buri and Sukhothai, and four each in Samut Prakan, Surin and Rayong.
Coronavirus-related deaths were also reported in 35 other provinces.
Bangkok led the most new infections with 3,095 cases, followed by 1,300 in Chon Buri, 965 in Nakhon Si Thammarat, 922 in Samut Prakan and 893 in Samut Sakhon.
Ten travellers from the United Kingdom led the 40 imported cases, followed by five from Australia and four from Myanmar.
Since the pandemic started in early 2020, there have been 3,711,595 Covid-19 cases, including 1,488,160 cases this year, with 3,427,054 complete recoveries to date.
The accumulated death toll stood at 25,415 since the beginning of the pandemic.
The highest number of Covid-related fatalities in a 24-hour period was 312 recorded on Aug 13. The highest number of cases was 28,379 on April 1.