The civil parish has an area of 19.88 km2 (7.68 sq mi) and in the 2001 UK census had a population of 481 in 194 households, increasing to 487 at the 2011 UK Census. For the purposes of local government, the parish falls within the District of South Norfolk.
Haddiscoe railway station, on the Wherry Lines service between Norwich and Lowestoft, is within the parish although approximately 2.5 km from the centre of the village. The Haddiscoe Cut (New Cut), a canal which joins the River Waveney and the River Yare, joins the River Waveney within the parish and close to the railway station. Toft Monks mill is a disused drainage windpump which once drained the marshes into the River Waverney.
St Mary's Church at Haddiscoe is one of the 124 round-tower churches of Norfolk, believed - despite its round tower- to be of early Norman origin. Jan Pier Pier, a 16th-century Dutch immigrant and creator of some of the dykes surrounding the village, is buried in the Church nave. The Church also contains frescoes from the 14th century representing the Black Death of 1349.