North America:
* Canada: Throughout the country, except for the Arctic.
* United States: From Alaska and Maine in the north to California and Florida in the south.
* Mexico: Limited to the northern regions.
Europe:
* Scandinavia: Sweden, Norway, Finland.
* Central Europe: Germany, Poland, Czech Republic, Austria, France, etc.
* Eastern Europe: Russia, Belarus, Ukraine, etc.
Asia:
* Russia: Siberia, Kamchatka Peninsula.
* Mongolia: Altai Mountains.
* China: Xinjiang region.
Note: The distribution of beaver populations varies depending on the species. North American beavers (Castor canadensis) are found across North America, while Eurasian beavers (Castor fiber) are found in Europe and Asia.