Elphinstone Slipway is a publicly managed boat ramp located at Sutton Harbour in Plymouth, operated by Plymouth City Council and free to use. The slipway has an L-shaped layout, approximately 6–12 metres wide, and provides access to the water at most tides.

The corner of the L is awash either side of high tide and flattens out to mud for around 10 metres at low tide. The ramp is suitable for the launch and recovery of most small boats, including those brought on trailers.

Vehicles may access the slip for launching and recovery but must not be parked on the main slipway itself. A car park with around 60 spaces is located at the top, where charges apply, and toilet facilities are available nearby.