It is reported by kp.ru.
The previous record was set the day before - 4382 cases, they said at the operational headquarters.
Also, 60 people died in St. Petersburg in a day, another 2646 recovered.
During the pandemic, 897,851 residents were diagnosed with coronavirus, of which 830,723 patients recovered.
29,248 people have died.
Earlier, the immunologist Nikolai Kryuchkov, Candidate of Medical Sciences, spoke about the properties of Omicron in an interview with URA.RU.