Citing “overwhelming demand,” MetLife Stadium announced a third show has been added for Taylor Swift’s “Reputation” tour.

The news came a day after The Post reported Swift’s schedule of 33 North American dates had yet to produce a single sellout — despite seats being available to the general public since Swift’s birthday on Dec. 13.

By comparison, all the dates on Swift’s “1989” tour in 2015 “sold out within minutes,” according to concertsandsports.com.

Swift already has MetLife shows at the Meadowlands scheduled for July 20-21 and there are plenty of seats available, Ticketmaster’s interactive seat charts showed on Wednesday.

Tickets for the third show, on July 22, will go on sale on Jan. 31, the stadium said. A presale effort, powered by Ticketmaster Verified Fan, will open for registration on Friday and continue until Jan. 18.

Swift, whose “Reputation” was the top-selling album of 2017, also added six other dates to the North American tour that kicks off on May 8 in Phoenix.