Cornwall Partnership Trust was caring for 10 coronavirus patients in hospital as of Wednesday, figures show.
NHS England data shows the number of people being treated in hospital for Covid-19 by 8am on Nov-16 was up from seven on the same day the previous week.
There were three beds occupied by Covid-19 patients four weeks ago in Cornwall Partnership NHS Foundation Trust.
Across England there were 5,010 people in hospital with Covid as of Nov-16, with 122 of them in mechanical ventilation beds.
The number of Covid-19 patients hospitalised nationally has decreased by 52% in the last four weeks, while the number on mechanical ventilators has decreased by 41%.
The figures also show that 11 new Covid patients were admitted to hospital in Cornwall Partnership NHS Foundation Trust in the week to Nov-14. This was up from six in the previous seven days.