Windsor Road is a notable road in the Hills District of Sydney, linking Windsor and North Parramatta in Sydney's west.

It continues in a southerly direction to cross over James Ruse Drive in Northmead, before eventually terminating at the intersection of North Rocks Road and Church Street in North Parramatta.

The North West T-way runs next to and parallel to Windsor Road from Kellyville to Rouse Hill.

Metroad 2 was also allocated along it in 1993 between Windsor and Showgrounds Road in Castle Hill, until M2 Hills Motorway opened in 1997 and Metroad 2 was truncated to the intersection with Old Windsor Road in Kellyville.

State Route 40 was also re-aligned in 2007 to follow Metroad 2 along Old Windsor Road, leaving the portion of the road south of the intersection in Kellyville unallocated.