Putahi is a 381 m (1,250 ft) high rhyolite dome, in the Kaikohe-Bay of Islands volcanic field in New Zealand.

It was the site of the first, successful for the British, battle of the Flagstaff War of 1845–46 against Hōne Heke's Ngāpuhi tribe fraction.

Lieutenant-Colonel William Hulme and his force of about 200 soldiers, marines and volunteers having destroyed a coastal pā at Ōtuihu moved on Hōne Heke at his new pā (Te Mawhe Pā) on the Lake Ōmāpere side of Puketutu which they arrived at on 7th May 1845 before its fortifications were fully complete.

However the next day, they were attacked on the flank by a force of 140 fighters led by Te Ruki Kawiti and as the British dealt with this, Hōne Heke attacked from the pā defences.

The Māori learnt an important lesson at Puketutu: that the British were a formidable foe in open battle and changed their tactics towards using fully prepared pās in future clashes.