The source said the public health team were aware and arrangements have been made for her to be moved to an MIQ facility.
Public health staff have said they are confident the risk of infection is low but, as a precaution, testing is being arranged for all staff and residents.
"A resident at Edmonton Meadows retirement village in Henderson has been confirmed as having Covid-19," the Ministry of Health said in a statement.
"Both staff and residents at the village have very high vaccination rates.
"Investigations are underway to determine the source of the infection and identify close contacts. At this stage, no staff members are required to stand down."