The Robinson R66 is a helicopter designed and built by Robinson Helicopter Company. It has five seats, a separate cargo compartment and is powered by a Rolls-Royce RR300 turboshaft engine. The R66 is slightly faster and smoother than the Robinson R44 from which it is derived.

The R66 is a single-engined helicopter with two-bladed main and tail rotors, and a fixed skid landing gear. Like the R44, the R66 has both electromechanical instruments and optional digital glass cockpit. It is the first Robinson helicopter with a cargo hold; the hold carries up to 300 pounds (140 kg). The RR300 has a simplified single-stage centrifugal compressor which makes it less expensive and is expected to result in lower maintenance costs.