With the 405 new victims, the country's total COVID-19 deaths mounted to 66,732, Health Ministry said.
Some 21,644 new cases of infection with the COVID-19 were found over the past 24 hours, the highest daily cases recorded, 3,092 patients have been hospitalized, it added.
It noted that 1,785,358 patients out of a total of 2,237,089 infected people have recovered or been discharged from the hospitals.
Some 4,766 other COVID-19 patients are in critical condition and being treated in intensive care units, it stated.
It added that 14,386,423 tests have so far been carried out in Iran.