Route 305 is a collector road in the Canadian province of Nova Scotia.

It is located in the Cape Breton Regional Municipality and connects Little Bras d'Or at Highway 105 with Westmount at Trunk 4.

It was originally known as Trunk 5 until 1970.

In the 1960s between Point Edward and Sydney River this highway was also used for Nova Scotia Highway 125.

This Nova Scotia road, road transport or highway-related article is a stub.