There were 4,971 new Covid-19 cases and 33 more fatalities recorded during the previous 24 hours, the Public Health Ministry announced on Thursday morning.
The number of new cases rose from 4,886 announced on Wednesday, when the country recorded 43 more deaths.
On Wednesday, 5,402 Covid-19 patients were discharged from hospitals after recovering from the coronavirus.
Since April 1, when the third wave of Covid-19 began, Thailand has treated 2,096,866 Covid-19 patients, 2,003,730 of whom have recovered to date.
Since the pandemic started early last year, there have been 2,125,729 Covid-19 cases, with 2,031,156 complete recoveries so far.
The death toll stood at 20,753 during the third wave and 20,847 since the beginning of the pandemic.