As the name implies, the district comprises the southwestern portion of New Brunswick.

The neighbouring ridings are Tobique—Mactaquac, Fredericton, Fundy Royal, and Saint John.

The territory of the riding was combined with the area around Belleisle Bay in south-central New Brunswick), and named "St. Croix—Belleisle".

It gains the City of Saint John west of the St. John River from Saint John—Rothesay; gains Burton from Fredericton; and loses the Parishes of Dumfries, Prince William, Manners Sutton, Kingsclear, and the municipalities of Hanwell, and Harvey and the Indian Reserve of Kingsclear 6 to Tobique—Mactaquac.

Ethnic groups: 97.1% White, 1.9% Aboriginal Languages: 94.4% English, 4.1% French Religions: 79.8% Christian (22.7% Catholic, 16.2% Baptist, 13.3% Anglican, 10.0% United Church, 5.8% Pentecostal, 2.2% Presbyterian, 9.6% Other), 19.8% No religion Median income (2010): $27,133 Average income (2010): $34,743 This riding has elected the following members of Parliament: