No dates had been decided but the Apec summit was usually hosted between September and November, the spokeswoman said.
Recent summits have had roughly 5000 to 7000 delegates and 3000 to 4000 media representatives.
Hosting will put pressure on a city of Auckland's size, with at least 10,000 visitors expected.
Last year's host, Manila, closed roads and diverted traffic from major routes, disrupting it and forcing some commuters to walk to work.
Several major airlines cancelled flights to clear the way for Apec arrivals and departures, and groups took the chance to stage protests.
The event could require a law change, too - in 1999 the Government passed the Arms Amendment Act, which expired after the summit, allowing the authorisation of foreign protection officers to carry weapons.
Apec was set up in 1989 to foster growth and trade in Asia-Pacific. Its 21 members include New Zealand, Australia, the US, China, Canada, and Japan.
Peru will host this year's leaders' meeting in November, shortly after the US elections. President Obama is expected to attend, ahead of the US President-elect being sworn-in on Inauguration Day on January 20 next year.