That diversity makes Hamilton Mountain a swing riding in which many elections are virtually two-way or three-way ties.

With the Liberal resurgence during the 2015 election, the vote difference of the three major parties has narrowed, solidifying the riding's status as a three-way tossup.

In 1976, it was redefined to consist of the part of the City of Hamilton lying south of the brow of the Mountain bounded on the east by Red Hill Creek, on the west by the west limit of the city, and on the south by Mohawk Road, Limeridge Road, and Mountain Brow Boulevard.

While remaining similar to the 2012 Representation Order, Hamilton Mountain gained a small section of Flamborough-Glanbrook.

[5] According to the 2021 Canadian census[6] Languages: 69.6% English, 3.0% Arabic, 2.5% Italian, 2.3% Spanish, 2.0% Tagalog, 1.4% Aramaic, 1.3% Portuguese, 1.0% French Religions: 57.4% Christian (30.5% Catholic, 3.8% Anglican, 3.4% United Church, 2.5% Christian Orthodox, 1.6% Presbyterian, 1.4% Pentecostal, 1.4% Baptist, 12.8% Other), 7.7% Muslim, 1.5% Hindu, 30.9% None Median income: $39,200 (2020) Average income: $46,360 (2020) This riding has elected the following members of Parliament: