Steyr is a city in Upper Austria.
Steyr may also refer to:
- Steyr-Daimler-Puch, formerly a large manufacturing conglomerate based in Steyr, Austria
- Magna Steyr, an automotive manufacturer, originally part of this company
- Steyr automobile, a former car brand of this company
- Steyr Mannlicher, a firearms manufacturer, originally part of this company, now known as Steyr Arms
- Steyr Motors GmbH, a manufacturer of diesel-engines, originally part of this company
- Steyr Tractor, a former marquee of this company, now part of CNH Industrial
- Steyr Arms, an Austria-based firearms manufacturer, formerly known as Steyr Mannlicher
- Steyr AUG, a rifle manufactured by this company (introduced c. 1978)
- Steyr GB, a handgun manufactured by this company (introduced c. 1968)
- Steyr M, a handgun manufactured by this company (introduced c. 1999)
- Steyr M1912 pistol, a handgun manufactured by this company (introduced c. 1912)
- Steyr Model 1912 Mauser, a rifle manufactured by this company (introduced c. 1912)
- Steyr TMP, a machine pistol manufactured by this company (introduced c. 1992)
- 9×23mm Steyr, a centerfire pistol cartridge developed for the M1912 pistol