Canon Island (Irish: Oileán na gCanánach) is an island and townland situated in the Shannon Estuary, in County Clare, Ireland. It is about 2.5 km (1.6 mi) east of the village of Kildysart and about 1.5 km (0.9 mi) from the shore on the mainland.

The island is home to the ruins of Canon Island Abbey, an Augustinian monastery built in the late 12th century.

Historical population

Year Pop. ±% 1841 54 —     1851 37 −31.5% 1861 39 +5.4% 1871 39 +0.0% 1881 30 −23.1% 1891 24 −20.0% 1901 24 +0.0% 1911 20 −16.7%	Year Pop. ±% 1926 18 −10.0% 1936 12 −33.3% 1946 9 −25.0% 1951 7 −22.2% 1956 6 −14.3% 1961 5 −16.7% 1966 4 −20.0% 1971 5 +25.0%	Year Pop. ±% 1979 0 −100.0% 1981 0 0.00% 1986 0 0.00% 1991 0 0.00% 1996 0 0.00% 2002 0 0.00% 2006 0 0.00%
Source:s Central Statistics Office. "CNA17: Population by Off Shore Island, Sex and Year". CSO.ie. Retrieved 12 October 2016.

• Canon Island Farm

• A Topographical Dictionary of Ireland by Samuel Lewis at Library Ireland