Viimsi Parish is a rural municipality in Northern Estonia, located North-East and neighbouring the capital Tallinn. It occupies an area of 72.84 km2 (28.12 sq mi) with a population of 20 580. The municipality contains the Viimsi Peninsula and several islands, including Naissaar, Prangli, and Aksi.

Naissaar is an island in Estonia. It is located in the Gulf of Finland, northwest of the capital city Tallinn, and is administratively part of Viimsi Parish. The island has an area of 18.6 square kilometres. It is 8 kilometres long and 3.5 kilometres wide, and lies about 8.5 kilometres from the mainland. The highest point on the island is Kunilamägi, which is 27 metres above sea level. The island consists predominantly of coniferous forest and piles of stones and boulders. In 2020, the island had a population of 17; in 2011 the island had about 35 permanent residents and some summer residents.