The district includes the United Counties of Prescott and Russell, the Township of North Glengarry and the former City of Cumberland (except for Orleans).

In 1996, it was redefined to consist of the United Counties of Prescott and Russell, the County of Glengarry (excluding the Township of Charlottenburgh), the Township of Cumberland in the Regional Municipality of Ottawa-Carleton, excluding the part west of Trim Road and North of Innes Road.

In 2003, it was redefined to consist of the United Counties of Prescott and Russell, the Township of North Glengarry in the United Counties of Stormont, Dundas and Glengarry, and the part of the City of Ottawa east Cardinal Creek, Regional Road No.

Following the 2022 Canadian federal electoral redistribution, this riding will be renamed Prescott—Russell—Cumberland at the first election held after approximately April 2024.

[2] It will gain the area east of Cardinal Creek and the rural area around the Mer Bleue Bog south to Highway 417 (including Carlsbad Springs and Ramsayville) from Orléans, and will gain a small piece of territory south of Innes Road from Ottawa—Vanier.