The Newmarket Line is a railway line in Auckland, New Zealand, that runs between Quay Park Junction, near Britomart Transport Centre, and Newmarket Train Station. It is 2.64 km long. It connects the North Island Main Trunk (NIMT), which runs from the east into Britomart via the waterfront, and the North Auckland Line (NAL), which runs between Westfield Junction and Otiria via Newmarket and Whangarei. It has been named the Newmarket Line since 2011. From 1996 to 2011, it was named the Auckland–Newmarket Line, as it ran from Auckland Railway Station until the station closed in 2003. From 1977 to 1996, it was named the Newmarket Branch Railway.