State Highway 49 runs through the town, as does the North Island Main Trunk Railway. From 18 December 1917 until 1 January 1968, Ohakune was also the junction for the Raetihi Branch, a branch line railway to Raetihi. A truss bridge formerly used by this branch still stands near the big carrot.
Seventeen kilometres to the east of the town is the Tangiwai bridge, site of New Zealand's worst railway accident, on 24 December 1953
