The riding covers the northwest of the Scarborough part of Toronto. It is bounded on the west by Victoria Park Avenue, on the north by the Toronto city limits (Steeles Avenue East), on the east by Midland Avenue, and on the south by Highway 401. It contains the neighbourhoods of Steeles, L'Amoreaux, Tam O'Shanter-Sullivan, Agincourt (west of Midland Avenue) and Milliken (west of Midland Avenue).

1987-1996

1996 to 2003 (remained the same)

2003 to 2015

Immigrants make up 67.8% of the population of Scarborough—Agincourt, the highest such percentage for any Canadian federal riding; those from Asia and the Middle East alone, constitute a majority of the population (53.0%), which is also the highest figure for any federal riding, and, in particular, immigrants from the People's Republic of China are almost a quarter (24.7%) of the riding's population, another Canadian high. Chinese, not otherwise specified (i.e. Cantonese, Mandarin, etc.) is the home language for 12.0% of the people in Scarborough—Agincourt (another demographic record).

Ethnic groups: 46.0% Chinese, 20.8% White, 15.1% South Asian, 5.3% Black, 3.8% Filipino, 1.9% West Asian, 1.6% Arab
Languages: 41.3% Chinese, 32.5% English, 5.1% Tamil, 2.3% Tagalog, 1.8% Armenian, 1.7% Arabic, 1.6% Greek, 1.6% Arabic, 1.4% Italian, 1.4% Urdu, 1.2% Persian
Religions: 42.7% Christian (18.0% Catholic, 5.3% Christian Orthodox, 2.3% Anglican, 2.0% Baptist, 1.7% United Church, 1.5% Pentecostal, 1.0% Presbyterian, 10.9% Other Christian), 7.9% Hindu, 6.5% Muslim, 5.6% Buddhist, 36.5% No religion
Median income (2010): $20,702
Average income (2010): $29,076

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