National Route 1D (Vietnamese: Quốc lộ 1D (or abbrv.

QL1D)) is a road in South Central Coast of Vietnam.

It connects Route 1 (QL1) to Quy Nhơn and continues along the coast to Sông Cầu District in Phú Yên Province rejoining QL1A.

The total length of the route is 33 km.

[1] The route runs along the coastal tourist area South of Quy Nhon to Sông Cầu.