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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.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Thetford Mines is a city in south-central Quebec, Canada, and the seat of Les Appalaches Regional County Municipality. It is best known for its historical role as a major asbestos-mining centre and for its mining heritage museums and landscapes. The city was incorporated in 1905.

Geography

Thetford Mines is situated in the Appalachian Mountains in Chaudière-Appalaches, Quebec, near the Bécancour River. Sources place it south or south-east of Quebec City and east-northeast of Montreal.

History

The city was incorporated in 1905 and developed around asbestos mining that began after deposits were discovered in the area in 1876. Thetford Mines later became strongly associated with chrysotile asbestos production.

Economy

Mining dominated the local economy for much of the 20th century, but the city has also developed manufacturing and other sectors. The closure of the last mine in 2012 marked the end of large-scale asbestos extraction in the area.

Demographics

Statistics Canada recorded a population of 26,072 in 2021, up from 25,403 in 2016. The city had 12,216 occupied private dwellings out of 13,059 total.

Culture and tourism

Thetford Mines is known for its mining heritage museums and landscapes linked to its industrial past. Tourism material highlights the region’s mining history, turquoise water-filled pits, and outdoor trails.

Key facts

  • Thetford Mines is located in the Appalachian Mountains in south-central Quebec.
  • It is the administrative seat of Les Appalaches Regional County Municipality.
  • The city was incorporated in 1905.
  • Its 2021 population was 26,072.
  • The last mine in the area closed in 2012.
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Canadian context

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]

Frequently asked questions

What is Thetford Mines best known for?
It is best known for its history as a major asbestos-mining centre in Canada.
Where is Thetford Mines located?
It is in south-central Quebec, in the Appalachian Mountains, within the Chaudière-Appalaches region.
When was Thetford Mines incorporated?
The city was incorporated in 1905.
What was the population of Thetford Mines in 2021?
Statistics Canada recorded a population of 26,072 in 2021.
Is Thetford Mines still mining asbestos?
No. The last mine in the area closed in 2012.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/Thetford_Mines
    Supports: Population, location, municipal seat, area, density, climate, and historical asbestos association.
  2. The Canadian Encyclopedia — https://thecanadianencyclopedia.ca/en/article/thetford-mines
    Supports: Incorporation date, location, asbestos-mining history, last mine closure, economic diversification, and museum/tourism context.
  3. Carleton University — https://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 Québec — https://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.