Altdorf (German for "old village") is the capital of the Swiss canton of Uri. The municipality covers an area of 10.23 square kilometers (3.95 sq mi) and is located at a height of 462 meters (1,516 ft) [[above sea level]], to the right of the Reuss.

The official language of Altdorf is (the Swiss variety of Standard) German, but the main spoken language is the local variant of the Alemannic Swiss German dialect.