|area||12.39 km2 (4.78 sq mi)|
|• density||1,006/km2 (2,610/sq mi)|
|sovereign state||united kingdom|
|postcode district||nr5, nr8|
|ambulance||east of england|
- south norfolk
- norwich south
costessey (/ koss-ee) is a civil parish situated 4 miles (6.4 km) west of norwich in norfolk, england. the parish comprises two settlements: the long-established town of costessey (now commonly old costessey) (2011 population 7,265), and new costessey (population 5,198), which developed during the first half of the 20th century and has become a suburb of norwich. the two settlements are separated by the river tud and by arable land. costessey's northern boundary with taverham, drayton and hellesdon follows the course of the river wensum.
costessey parish has an area of 12.39 km2 and in the  it constitutes the most northern reaches of the predominantly rural south norfolk district; costessey is the second largest population centre within the district, after wymondham. the population of costessey civil parish at the 2011 census was shown as 12,463.