Hen Reedbeds is a 55 hectare nature reserve near the North Sea coast of the English county of Suffolk. The reserve is located in the Blyth valley between Reydon and Blythburgh, approximately 2.5 miles (4.0 km) west of Southwold. The marshes make up part of the Suffolk Coast National Nature Reserve along with reserves at Walberswick and Dingle Marshes.