A third woman, who was with the two women who travelled to Northland, has tested positive for Covid-19.
The other women also tested positive for the coronavirus, and the Ministry of Health said all three are in a quarantine facility.
In a statement, the ministry said the third woman was in Northland with the other two women.
"Public health officials have determined she wasn't infectious while she was in Northland between 2-8 October. Her infectious period has been determined as beginning after she returned to Auckland.
"Three household contacts and two other contacts have been identified by public health officials. These contacts follow a visit to a private home in Auckland and shared transport to the testing centre."