"We're also seeing an emergence of 'super shoppers' – with nearly one in 10 Kiwi online shoppers spending over $9,000 online," he said.
Dobson said the report was "good news" for Kiwi businesses.
"Spending with New Zealand online stores grew at nearly double the rate of growth for international online stores – encouraging news for our local e-tailers," he said.
"Although New Zealanders still enjoy shopping internationally with nearly one dollar in every three spent with an offshore online retailer, they also say that they prefer to buy from local retailers because they trust them and would like to support home-grown businesses," Dobson said.
There was also a rise in the popularity of Buy Now Pay Later Payment methods, such as Afterpay, with 12 per cent of shoppers using these payment methods last year.
Most were aged under 45 and over half of those were women.
Dobson said the most prominent online shoppers in New Zealand were women aged between 30 and 45 who lived in rural areas.
"NZ Post is delivering well over half of all parcels bought online in New Zealand and we're proud to be integral to that moment of joy when your online shopping parcel arrives.
"Customer needs are changing quickly, and they want speed, efficiency and convenience.
"Most online retailers in New Zealand use NZ Post to connect with their customers. With the leading delivery service we provide, and with the wealth of insights in this report, we are committed to helping online retailers to grow a better online business," he said.