Someone asked me to put together a list of sites I'd used to compile family histories. I had a good head scratch and came up with these. 1. CENSUS RETURNS
What it says on the tin - it contains details of the census forms for 1901 and 1911 and also bits and pieces from 1821-51. http://www.census.nationalarchives.ie/ 2. CENSUS SEARCH FORMS
These are from the first couples of decades of the last century when the old age pension was introduced. People aged 70 or over in 1908 were eligible but needed access to census data from 1841 or 1851 to prove their age. So they submitted requests to the authorities who would then check the census records. So, there are in some cases details of census records that were subsequently destroyed in the early 1920s.
More info here: http://censussearchforms.nationalarchives.ie/search/cs/home.jsp
You can run searches here. http://censussearchforms.nationalarchives.ie/search/cs/ 3. GRIFFITHS VALUATIONS
Griffiths Valuations - carried out between 1848 and 1864 to assess liability to pay the Poor Law Union rate. They're on this website: www.askaboutireland.com
You can search the records here: http://www.askaboutireland.ie/griffith-valuation/index.xml
Only the head of household is mentioned. 4. TITHE APPLOTMENT BOO
The website is http://titheapplotmentbooks.nationalarchives.ie/search/tab/home.j etc ...
The information is from the 1820s and 1830s. It was compiled to determine the amount which occupiers (of all faiths) of holdings over one acre should pay in tithes to the Church of Ireland. 5. FLAX GROWERS OF 1796
Might be useful - it contains some 60,000 records. http://www.failteromhat.com/flax1796.php 6. ROOTS IRELAND
The website is www.rootsireland.ie. It has a lot of church records, baptisms marriages etc. You have to pay to do meaningful searches. 6. ELLIS ISLAND WEBSITE.
This one is handy for looking up relatives who emigrated to the USA - www.ellisisland.org 7. GENERAL WEBSITES
The last two are free. The first three sometimes do special offers.
www.ancestry.com http://www.militaryarchives.ie/ https://familysearch.org/ http://www.irishnewsarchive.com/ 8. OLD IRISH NEWSPAPERS
I got some bits and bobs in here. It's hit and miss though. http://www.irelandoldnews.com/ 9. ORDNANCE SURVEY MAPS
Not much use for names but comparing the 1830s map and the 1890 (approx.) map with the ones in the Griffiths Evaluations can be handy in terms of figuring out who lived where. http://maps.osi.ie/