Irish Census Records 1821-1911 online

1821 Census
Colebrooke (Aghalurcher, Fermanagh)

Irish Census Records from 1821 to 1911 (with gaps 1861 to 1901) are now available online. 

The earlier records are scattered and many have not survived but The National Archives of Ireland has a searchable database of the available counties and years.

You can also browse by years in the available counties:

1821 Antrim Carlow Cavan Dublin Fermanagh Galway Kilkenny King's Limerick Mayo Meath 1831 Antrim Londonderry 1841 Antrim Carlow Cavan Cork Dublin Fermanagh Limerick Longford Mayo Monaghan Queen's Tyrone Westmeath Wicklow 1851 Antrim Armagh Cavan Clare Donegal Down Dublin Fermanagh Kerry Kildare Leitrim Limerick Londonderry Longford Mayo Meath Monaghan Queen's Roscommon Sligo Tipperary Tyrone Waterford Wexford Wicklow

1901 Antrim Armagh Carlow Cavan Clare Cork Donegal Down Dublin Fermanagh Galway Kerry Kildare Kilkenny King's Co. Leitrim Limerick Londonderry Longford Louth Mayo Meath Monaghan Queen's Co. Roscommon Sligo Tipperary Tyrone Waterford Westmeath Wexford Wicklow  1911 Antrim Armagh Carlow Cavan Clare Cork Donegal Down Dublin Fermanagh Galway Kerry Kildare Kilkenny King's Co. Leitrim Limerick Londonderry Longford Louth Mayo Meath Monaghan Queen's Co. Roscommon Sligo Tipperary Tyrone Waterford Westmeath Wexford Wicklow