Route 106 is a highway in New Brunswick, Canada; running from an intersection with Route 1 and western intersection in Route 905 in Petitcodiac to the intersection of Trans-Canada Highway (Route 2) and the southern terminus of Route 940 at Sackville; a distance of 91.8 kilometres. From Petitcodiac, Route 106 is known as the "Old Post road" and crosses the river to the passing the eastern terminus of Route 885 to the north bank of the Petitcodiac River.