It's to help plan for the future in terms of schools, buses, hospitals and many other services.
In all there are 35 questions on the form – the information is confidential and is only used for statistical reasons.
The last Census in 2011 showed there were 158,652 people living in the Premier County.
Fergus Hopper is the Census liaison officer for Tipperary and says it's vital that the forms are filled out correctly.
