Earlier this week, the State Library blog reported that the 1901 census for Ireland  is now available free online on the National Archives of Ireland website. The 1901 census, along with the 1911 census, which has been available online since 2007, are the first two complete surviving censuses for Ireland, making the National Archives of Ireland website an invaluable resource for tracing Irish ancestry.

Links: 
Original post on the SLWA blog – Irish 1901 census now online « SLWA Blog
National Archives of  Ireland – http://www.census.nationalarchives.ie