The Alz is a river in Bavaria, southern Germany, the only discharge of the Chiemsee. Its origin is on the northern shore near Seebruck. It is a right tributary of the Inn, into which it flows in Marktl. Other towns on the Alz are Altenmarkt an der Alz, Trostberg, Garching an der Alz and Burgkirchen an der Alz.
The Alz is divided into the Obere Alz (upper Alz) and the Untere Alz (lower Alz). The section from the Chiemsee up to Altenmarkt is called the Obere Alz. The section from Altenmarkt to the mouth in Marktl is called the Untere Alz.
The Traun, a 27km river flowing past the regional administrative center of Traunstein, is a tributary of the Alz.
Alz or ALZ can refer to:
- Alz, a river in Bavaria, Germany
- ALZip, a computer archive and compression utility
- Alitak Seaplane Base, a seaplane base with the IATA code ALZ
- ALZ (steelworks), Belgian steelworks
- alz, the ISO 639-3 language code for the Alur language
- The Armée de Liberation de Zgharta (ALZ), Lebanese political party and militia
ALZ (Allegheny-Longdoz) is a stainless steel producer based in Genk in Limburg province, Flanders, Belgium.
In 2001 the company was merged with French stainless steel producer Ugine and in 2006 became part of the ArcelorMittal group as part of the stainless steel division.