Hamilton—Wentworth initially consisted of: (a) the eastern part of the City of Hamilton (east of a line drawn from north to south along Parkdale Avenue, west along the Canadian National Railway line, south along Strathearne Avenue, west along Roxborough Avenue, south along Kenilworth Avenue, the brow of the Mountain and Mountain Brow Boulevard, east along Mud Street to the east limit of the City of Hamilton); (b) the Townships of Ancaster, Binbrook and Saltfleet and the southern part of the Township of Glanford (south of County Suburban Road No.

22) In 1976, it was redefined to consist of the Townships of Flamborough and Glanbrook, the Towns of Ancaster and Dundas, and the southern part of the City of Hamilton (lying south of a line drawn from west to east along Limeridge Road, south along Mountain Brow Boulevard, north along Red Hill Creek, east along the brow of the Mountain to the east city limit.

Ancaster—Dundas—Flamborough—Aldershot consisted of the now former towns of Ancaster, Dundas and Flamborough plus that part of Burlington contained in the community of Aldershot (which it gained from Halton.

Upon the 2003 redistribution, the riding lost Aldershot but gained the Ainslie Wood and Westdale neighbourhoods of Hamilton.

Ethnic groups: 92.7% White, 2.1% East Asian, 1.6% South Asian Languages: 83.4% English, 1.1% French, 14.7% Other Religions: 45.0% Protestant, 27.7% Catholic, 1.6% Christian Orthodox, 2.7% Other Christian, 1.8% Jewish, 1.2% Muslim, 18.6% No affiliation Average income: $37,986 Riding associations are the local branches of the national political parties: This riding has elected the following members of Parliament: On the resignation of Mr. O'Sullivan, 14 September 1977: