1. United States:

* Appalachian Basin: This is the largest coal-producing region in the U.S., extending across parts of Pennsylvania, West Virginia, Virginia, Kentucky, Ohio, and Maryland.

* Powder River Basin: Located in Wyoming and Montana, this basin contains vast reserves of low-sulfur coal.

* Illinois Basin: This basin spans parts of Illinois, Indiana, and Kentucky, containing a significant amount of bituminous coal.

2. China:

* Inner Mongolia, Shanxi, and Shaanxi provinces: These regions hold enormous reserves of coal, making China the world's largest producer and consumer of coal.

3. Russia:

* Siberia and the Kuzbass region: These areas are home to vast reserves of coal, with a large portion being exported.

4. Australia:

* Queensland and New South Wales: These regions boast significant reserves of coal, primarily used for export.

5. India:

* Chhattisgarh, Jharkhand, and Odisha: These states possess considerable coal reserves, crucial for the nation's power generation.

6. South Africa:

* Mpumalanga and Limpopo provinces: These regions hold substantial reserves of coal, primarily used for electricity generation.

7. Kazakhstan:

* Ekibastuz Basin: This basin holds substantial reserves of brown coal.

8. Germany:

* Ruhr Valley: This region historically held major coal reserves, though its mining activities have significantly declined.

9. Ukraine:

* Donbass Basin: This region contains vast reserves of coal, making Ukraine a significant producer.

10. Poland:

* Upper Silesian Coal Basin: This basin holds significant coal reserves, contributing to Poland's energy mix.

It's worth noting that these are just the largest deposits, and there are other countries with significant coal reserves around the world. The specific location of coal deposits within these countries can vary, and this information is subject to change as reserves are mined and new discoveries are made.