The electoral district was created in 2003. 82.9% of the riding came from its predecessor riding,
Ancaster—Dundas—Flamborough—Aldershot and 17.1% from
Hamilton West. Conversely,
Ancaster—Dundas—Flamborough—Aldershot was carved out of
Hamilton—Wentworth in 1996. Hamilton—Wentworth was created in 1968 from parts of
Wentworth and
Hamilton South. 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. In 1987, it was redefined to consist of the towns of Ancaster, Dundas and Flamborough, the township of Glanbrook, and the southern part of the City of Hamilton (lying south of a line drawn from east to west along the brow of the Niagara Escarpment, south along Redhill Creek, north along Mountain Brow Boulevard, west along Limeridge Road to St. Jerome School, west to Garth Street, south along Garth Street, and west along the proposed Mountain Freeway to the west city limit.) Hamilton—Wentworth was abolished in 1996 when much of the riding became the new Wentworth—Burlington riding, with some parts going to
Hamilton Mountain,
Hamilton West and
Stoney Creek. 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. Following the
2012 Redistribution Order, the riding will be dissolved and split between
Flamborough—Glanbrook and
Hamilton West-Ancaster-Dundas. ==Demographics==