Bauer Nilsen AS is a Norwegian company established in 1925. The company is located in Karmøy municipality.

The company started with production of central pressure lubricators. Expansion led to the design and production of high-pressure hydraulics.

Bauer-Nilsen produces an extensive range of high-pressure hydraulic equipment for the shipbuilding sector as well for offshore and land-based industry. The company is located together with BauerHydraulic Motors AS, which design and manufactures high pressure radial piston motors with corresponding valves. The two companies is co-located.