Land and Census Records

Griffiths Valuation

This was  a property tax survey carried out in the mid nineteenth century under the supervision of Sir. Richard Griffith  It was a detailed valuation of every piece of agricultural land and built property in Ireland. It lists every landholder and every householder in Ireland and is arranged by county, barony, Poor Law Union, civil parish and townland.

According to this survey which was carried out between 1847 and 1864, there were approximately 87 households with the surname Cass. Breakdown as follows:

As you can see  from the chart below the majority of householders are located in Kilkenny followed by Laois and Tipperary with just a tiny no in Dublin and Tyrone.

cass griffith

CountyCass Householders

1901 Census 

According to the 1901 census there were 184 individuals with the surname Cass and as shown in the attached spreadsheet below, the majority were from Co Kilkenny followed by Laois and Tipperary

cass census 1901

1911 Census

The 1911 census which has 186 individuals with the surname Cass shows a similar pattern with the majority from Co. Kilkenny. See breakdown below:

cass 1911 census


I decided to also look at those with the surname Cass who migrated to the UK. However, it must be remembered that there are no passenger lists of people who crossed the Irish Sea by ship. Unlike those who emigrated to  USA, Canada etc, those who migrated to the UK were not recorded on embarkation.  This was  because Ireland was a part of Britain until 1922 and they were regarded as internal migrants.

I decided to look that the UK census records to see how many with the Cass surname were born in Ireland. For this exercise, I looked at the census records from 1841-1911 on Family Search. Please note that these figures are only an estimate as it is difficult to get an accurate no. Details below

Cass UK Census

Cass surname in UK Census
Total 208


In order to discover the number of those with the surname Cass born in Ireland  I looked at the Canadian Census records from 1851-1901 on Family Search  and discovered that there were appropriately 101  individuals with the surname Cass born in Ireland.


From a search through the US census records from 1850 to 1910, there were approx over 1000 individuals with the surname Cass who were born in Ireland