Thornhill is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1997. It consists of the part of the city of Vaughan that is east of Highway 400 and south of Rutherford Road, and the part of the city of Markham west of Bayview Avenue. It covers the Thornhill neighbourhood, which is split between Vaughan and Markham. The riding was created in 1996 and the east end of the riding was split off into other ridings in 2012. The riding was initially safe for the Liberals, and they won large majorities of the vote in its first two elections. In 2004, the large Jewish population started shifting toward the Conservative Party, and the Conservatives won the riding in 2008. After being targeted by the Conservatives as part of their strategy to win a majority in 2011, the riding became a Conservative stronghold. Riding profile The riding is named after Thornhill, a community first settled along Yonge Street in the mid-1790s, around the time of the street's opening. The community of Concord occupies the northern and western parts of the riding. According to the 2016 census, the population of the riding was 112,719, up 2.1% from 2011. In 2015, the median income in the riding was $33,474 compared to $30,798 in 2010. The average income in the riding was $54,590 compared to $47,097 in 2010. The most spoken non-official language in the riding is Russian (14.5%) and 16.4% of the population is of Russian Ethnic origin. The second largest ethnic origin is Chinese with 11.2% in 2016. About 37% of the riding's population is part of a visible minority. The riding also has a large Jewish population (37.1% in 2011) and has been cited as showing voting trends among Jewish populations. The riding has a higher rate of postsecondary certificates, diplomas, and degrees than the Ontario average (66% compared to 55% for those aged 15+). The riding has been described as a Conservative stronghold. Demographics According to the Canada 2021 Census Ethnic groups: 57% White, 11.3% Chinese, 7% West Asian, 6.3% South Asian, 5.1% Korean, 4.8% Filipino, 2.6% Black, 1.5% Latin American, 1.1% Southeast Asian History 1996-2004: Liberal dominance The riding was first established in the 1996 redistribution from parts of York North and Markham—Whitchurch—Stouffville, consisting of the part of Vaughan east of Highway 400 and south of Rutherford Road, and