Round Island is an island in Poole Harbour

Poole Harbour

Poole Harbour is a large natural harbour in Dorset, southern England, with the town of Poole on its shores. The harbour is a drowned valley formed at the end of the last ice age and is the estuary of several rivers, the largest being the Frome. The harbour has a long history of human settlement...

 in the English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 county of Dorset

Dorset

Dorset , is a county in South West England on the English Channel coast. The county town is Dorchester which is situated in the south. The Hampshire towns of Bournemouth and Christchurch joined the county with the reorganisation of local government in 1974...

. It lies just off the shore of the Arne Peninsula

Arne, Dorset

Arne is a large village and civil parish in the Purbeck district of Dorset, England; situated east of Wareham. The local travel links are located from the village to Holton Heath railway station and to Bournemouth International Airport. The main road through the village is Arne Road connecting...

 in the south-west of the harbour, and is separated from the nearby uninhabited Long Island

Long Island (Dorset)

Long Island is an uninhabited island in Poole Harbour in the English county of Dorset. It lies just off the shore of the Arne Peninsular in the south-west of the harbour, and is separated from the nearby, and inhabited, Round Island by a narrow channel only a few feet wide. The island covers...

 by a narrow channel only a few feet wide.

The island is 15 acre

Acre

The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land.The acre is related...

s in size, being a private property with a mix of grassy paddocks and woodland.

Round Island lies within the civil parish

Civil parish

In England, a civil parish is a territorial designation and, where they are found, the lowest tier of local government below districts and counties...

 of Corfe Castle. The parish forms part of the Purbeck local government district

Non-metropolitan district

Non-metropolitan districts, or colloquially shire districts, are a type of local government district in England. As created, they are sub-divisions of non-metropolitan counties in a so-called "two-tier" arrangement...

.