The Waikato Connection was a short-lived express passenger train between Hamilton and Auckland in New Zealand's North Island. It consisted of a single weekday return service using diesel multiple unit railcars.

Like its southern counterpart, the Capital Connection between Palmerston North and Wellington, the service was operated by Tranz Scenic and run as a commercial venture.

The service commenced as a six-month trial on 26 June 2000 and was primarily aimed at business people who regularly commuted to work in Auckland. It used Silver Fern railcars with full onboard catering and stopped at the intermediate stations of Huntly, Pukekohe, Papakura, Middlemore, and Newmarket.

Four months into the trial the service was reported to be "performing up to expectations" and was later extended beyond the trial period.

Tranz Rail announced in October 2000 that it intended to exit the passenger rail business to concentrate on its freight interests. The new owner of Tranz Scenic, two directors of West Coast Railway in Australia, had limited purchase funds, and so were only prepared to purchase the most profitable services, prompting Tranz Rail to terminate those services that were not purchased, including the Waikato Connection. It was officially cancelled on 7 October 2001 along with the Geyserland Express, the Kaimai Express, and the Bay Express. A replacement Tranz Metro service between Auckland and Pukekohe commenced the following day.

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