Deenish Island (Irish: Duínis) is an island of the Atlantic Ocean belonging to County Kerry, Ireland.

The island is 122 acres; its highest hill is at 144 m. It's located in the Atlantic Ocean at around 1 km from Scariff Island and 6.1 km from Hogs Head, on the mainland.

In 1837 on Deenish (which at that time was called Dinish) resided three families who mainly lived on the cattle which grazed on the island. 1911 census still reported six people living on the island.

Historical population

Year Pop. ±% 1841 11 —     1851 8 −27.3% 1861 7 −12.5% 1871 7 +0.0% 1881 7 +0.0% 1891 9 +28.6% 1901 9 +0.0% 1911 4 −55.6%	Year Pop. ±% 1926 4 +0.0% 1936 8 +100.0% 1946 6 −25.0% 1951 5 −16.7% 1956 6 +20.0% 1961 10 +66.7% 1966 14 +40.0% 1971 6 −57.1%	Year Pop. ±% 1979 5 −16.7% 1981 6 +20.0% 1986 6 +0.0% 1991 5 −16.7% 1996 0 −100.0% 2002 0 0.00% 2006 0 0.00%
Source: Central Statistics Office. "CNA17: Population by Off Shore Island, Sex and Year". CSO.ie. Retrieved 12 October 2016.

• List of islands of Ireland

Media related to Deenish Island at Wikimedia Commons

• Scariff and Deenish, page on irishislands.info
• The island page on iscoverireland.ie