The Rolls-Royce RR300 is a turbine aircraft engine (turboshaft/turboprop) developed for the light helicopter/general aviation market.

Rated at up to 300 shp (224 kW) at take-off power, the RR300 is a rebadged and downrated variant of the Rolls-Royce Model 250-C20.

For instance the Model 250-C40, with an overall pressure ratio of 9.2:1 at an airflow 6.1 lb/s, develops 715 shp.

Rolls-Royce has also announced the signing of Memorandums of Understanding with Enstrom, MD Helicopters, RotorWay and Schweizer to discuss future applications of the RR300.

In March 2013, the engine was named as the power plant for the new Scott's Bell 47GT-6.