Eight of those announced on Saturday were active cases, which are contained, and the other was a historical case.
Of the eight, half were travelling separately, and arrived on November 30 from the United States.
They tested positive at routine day three testing. All have been transferred to the Auckland quarantine facility.
Yesterday's update revealed that 11 previously reported cases had recovered , which brought New Zealand's total number of active cases to 59.
As New Zealand winds down for the summer break, the Ministry of Health is warning Kiwis not to become complacent.
"With the countdown on until Christmas, the ministry asks that anyone hosting a party for staff ensures that everyone who is attending is well," it said in a statement this week.
"If anyone who was planning to attend is unwell, please consider how you can include them in your celebrations via video call or other means that ensure they can take part while everyone is kept safe."
