Hedenham is a civil parish in the English county of Norfolk. It covers an area of 7.30 km2 and had a population of 173 in 70 households at the 2001 census, including Thwaite St. Mary and increasing to 240 at the 2011 Census. For the purposes of local government, it falls within the district of South Norfolk. The villages name means 'Hedena's homestead/village' or 'Hedena's hemmed-in land'.