Aldeby is a village and civil parish in the English county of Norfolk. It is bounded to the south by the River Waveney, on the other side of which is Suffolk. The village is about five miles (8 km) by road from Beccles.
The civil parish has an area of 12.61 square kilometres and in 2001 had a population of 437 in 175 households. For the purposes of local government, the parish falls within the area of the district of South Norfolk.