Otto Wolff
| Industry | metal industry | 
|---|---|
| Founded | 1904 in Cologne, Germany | 
| Founder | Otto Wolff | 
| Defunct | 1990 | 
| Successor | August Thyssen-Hütte | 
| Products | Steel | 
Otto Wolff AG was a German steelmaker founded in Cologne by the industrialists Otto Wolff and Ottmar E. Strauß in 1904. One of the largest businesses in pre-war Germany, it exists today as an independent subsidiary of the ThyssenKrupp group.