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September 11, 2026Short & citedBlog
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Thetford Mines

Thetford Mines is a city in south-central Quebec, Canada, and the seat of Les Appalaches Regional County Municipality.

Updated September 11, 20261 min readCited sources

Thetford Mines is a city in south-central Quebec, Canada, best known as a former major asbestos-mining centre. It serves as the seat of Les Appalaches Regional County Municipality.

What it is

Thetford Mines is located in the Appalachian Mountains within the Chaudière-Appalaches region. Incorporated in 1905, the city grew around chrysotile asbestos deposits discovered in 1876. Its 2021 population was 26,072.

Why it matters

Thetford Mines was one of the world’s largest asbestos mining and production centres during the 20th century, shaping Canada’s industrial and environmental history. The last mine closed in 2012, and Canada banned asbestos products in 2018.

Key details

The city’s economy has shifted from mining to manufacturing and other sectors. It is known for mining heritage museums, turquoise water-filled pits, and outdoor trails. Thetford Mines covers 225.97 km² with a density of 115.4/km².

In short

  • Thetford Mines was a global asbestos mining hub until the last mine closed in 2012.
  • It is the seat of Les Appalaches RCM in Quebec’s Appalachian Mountains.
  • Population in 2021 was 26,072, with a growing tourism sector focused on mining heritage.
Canadian angle

Thetford Mines is part of Quebec’s industrial and environmental history, especially Canada’s former asbestos industry and the later ban on asbestos products in 2018.[2]

Quick questions

What is Thetford Mines best known for?
It is best known for its history as a major asbestos-mining centre in Canada.
When was Thetford Mines incorporated?
The city was incorporated in 1905.
Is Thetford Mines still mining asbestos?
No. The last mine in the area closed in 2012.

Sources

  1. Wikipediahttps://en.wikipedia.org/wiki/Thetford_Mines
    Supports: Population, location, municipal seat, area, density, climate, and historical asbestos association.
  2. The Canadian Encyclopediahttps://thecanadianencyclopedia.ca/en/article/thetford-mines
    Supports: Incorporation date, location, asbestos-mining history, last mine closure, economic diversification, and museum/tourism context.
  3. Carleton Universityhttps://serc.carleton.edu/NAGTWorkshops/health/case_studies/asbestos_canada.html
    Supports: Discovery of asbestos deposits in 1876 and the region’s role in global asbestos production.
  4. Bonjour Québechttps://www.bonjourquebec.com/en/where-to-go/regions-of-quebec/chaudiere-appalaches/thetford-mines
    Supports: Tourism and mining-heritage description of the city and region.