Third Army

Third Army may refer to:

Germany

 * 3rd Army (German Empire), a World War I field Army
 * 3rd Army (Wehrmacht), a World War II field army
 * 3rd Panzer Army

Russia and Soviet Union

 * 3rd Army (Russian Empire)
 * 3rd Army (RSFSR)
 * 3rd Army (Soviet Union)

Others

 * 3rd Army (Austria-Hungary)
 * Third Army (Bulgaria)
 * 3rd Army (France)
 * Third Army (Egypt)
 * Third Army (Hungary)
 * Third Army (Italy)
 * Third Army (Japan)
 * Third Army (Ottoman Empire)
 * Third Army (Romania)
 * Third Army (Serbia)
 * Third Army (Turkey)
 * Third Army (United Kingdom)
 * Third Army (Home Forces), also in the United Kingdom
 * Third Army (United States)