List of secondary highways in Nipissing District

This is a list of secondary highways in Nipissing District, many of which serve as logging roads or provide access to Algonquin Park and sparsely populated areas in the Nipissing District of northeastern Ontario.

Highway 523
Secondary Highway 523, commonly referred to as Highway 523, is a provincially maintained highway in the Canadian province of Ontario. The highway is a 20.1 km north–south route in Nipissing District which follows the historic Madawaska Colonization Road. The highway begins at the Nipissing-Hastings boundary, where it continues south to Highway 127. It ends at Highway 60 in the village of Madawaska.

Highway 531
Secondary Highway 531, commonly referred to as Highway 531, is a provincially maintained secondary highway in the Canadian province of Ontario. It connects Highway 17 east of North Bay with the community of Bonfield. The 3.5 km route was established in 1956, and has remained the same since then. It passes through a forested area and has several private residences located along its length. Aside from Maple Road, its southern terminus, and Highway 17, its northern terminus, Highway 531 encounters no roads along its length.

Highway 533
Secondary Highway 533, commonly referred to as Highway 533, is a provincially maintained secondary highway in the Canadian province of Ontario. The route begins in the town of Mattawa, at Highway 17, and travels north to Highway 63.

Highway 539
Secondary Highway 539, commonly referred to as Highway 539, is a secondary highway in the Canadian province of Ontario, located within the Sudbury and Nipissing Districts. Commencing at a junction with Highway 17 in the community of Warren, the highway extends northeasterly for 23.3 km to the community of River Valley, and thence southeasterly for 13.6 km to a junction with Highway 64 in Field.

A spur route, Highway 539A, extends northwesterly from Highway 539 at River Valley.

Highway 539A
Secondary Highway 539A, commonly referred to as Highway 539A, is a provincially maintained secondary highway in the Canadian province of Ontario, located within Nipissing District. Commencing at a junction with Highway 539 in the community of River Valley, the highway extends northwesterly for 13.1 km to a point near where the Sturgeon River crosses the boundary between Nipissing and Sudbury District. At this point, the roadway turns northward and continues as Highway 805.

Highway 575
Secondary Highway575, commonly referred to as Highway575, is a secondary highway in the Canadian province of Ontario, located within Nipissing District. Commencing at Highway17 in Verner, the highway travels to Highway 64 in the community of Field, a distance of 20.0 km.

Highway 630
Secondary Highway 630, commonly referred to as Highway 630, is a secondary highway in the Canadian province of Ontario. It provides access to Algonquin Provincial Park from the north at Kioshkakwi Lake. It is 27.7 km in length and links Highway 17 with the community of Kiosk. It was assumed as a provincial route on July28, 1961, by which time it was paved north of Eau Claire.

Highway 656
Secondary Highway 656, commonly referred to as Highway 656, is a secondary highway in the Canadian province of Ontario. It provides access to the Otto Holden Generating Station on the Ottawa River from a junction with Highway 533 located just north of Mattawa, a distance of 3.7 km. It was established on April8, 1965.