People who have not had their Census form collected have been asked to send it back by post themselves.
Enumerators are now completing their collections however, the Central Statistics Office (CSO) has advised households to post it back "without delay".
The CSO said the statistics from the Census will be vital for planning public services such as roads, schools, hospitals, and housing.
Returning Census forms by post is free of charge to the householder.
Census forms can be returned freepost to:
Central Statistics Office
PO Box 2021
Freepost 4726
Swords
Co. Dublin
K67 D2X4.
In a statement on Monday, the CSO said: "These statistics are vital for planning public services such as roads, schools, hospitals, and housing. Preliminary population figures from Census 2022 are expected to be published by mid-summer.
"As well as producing the results from Census 2022, the CSO is now looking ahead to the next Census which will take place in 2027. Plans are progressing on providing an online response option which will be part funded by the European Union National Recovery and Resilience plan."
Eileen Murphy, Head of Census Administration, added: "We have seen great public support for the Census so far and would encourage anyone who still has their form to please post it back as soon as possible.
"By law everyone who was present in the country on Census night must be recorded on a form, so it is really important that the completed forms are returned to us now. If you know of someone who needs extra support with their form, we ask you to check in with them and help them get in touch with us for further information if required."
If a Census form has been lost or damaged, people have been advised to contact the CSO for a replacement form online or by calling 0818 2022 04.
