Results from 4,341 PCR and antigen tests in the seven days to the end of Sunday, July 18, reflect an incidence rate of 156.45 per 100,000, up from 91.26 one week earlier. Two weeks ago the rate was below 50.
The benchmark incidence rate in the neighbouring Alpes-Maritimes is very similar, standing at 163 on Monday.
Meanwhile, 11 Monaco residents tested positive for coronavirus on Monday while four were declared fully-recovered.
Of three non-residents receiving treatment for coronavirus at Princess Grace Hospital, one is in intensive care.
Seventy-two Monaco residents with mild symptoms are recovering at home.