RSPB Minsmere is a nature reserve owned and managed by the Royal Society for the Protection of Birds (RSPB) at Minsmere, Suffolk. The 1,000-hectare (2,500-acre) site has been managed by the RSPB since 1947 and covers areas of reed bed, lowland heath, acid grassland, wet grassland, woodland and shingle vegetation. It lies within the Suffolk Coast and Heaths Area of Outstanding Natural Beauty and the Suffolk Heritage Coast area. It is conserved as a Site of Special Scientific Interest, Special Area of Conservation, Special Protection Area and Ramsar site.

Minsmere is a place in the English county of Suffolk. It is located on the North Sea coast around 3.5 miles (5.6 km) north of Leiston and 1.5 miles (2.4 km) south-east of Westleton within the Suffolk Coast and Heaths AONB. It is the site of the Minsmere RSPB reserve and the original site of Leiston Abbey.