Peter Road, or Peterville Road, labelled Route 159, is a 2-lane collector highway in western Prince County, Prince Edward Island, Canada.

The highway runs from Route 158 (Harper Road) to Route 160 (Ascension Road) passing through the communities of Peterville, Leoville, and Ascension.

The northernmost 800 metres of Peter Road was resurfaced in July 2008.

Addresses from the Route 160 (Ascension Road) intersection SW to before the clay road receive electric power from the Elmsdale/Tignish substation, and remaining addresses from the other end of the clay road to Route 158 (Harper Road) receive electric power from St. Louis/Bloomfield division.

Basic cable service from Eastlink is not available on the road, but High speed internet from Aliant Telecom is available from civic addresses 550–900 on Route 159.