Explainer: Here's what you need to know when filling out your census form tonight

Twins Zara and Mya Akinsowan, both age 8, at the launch of Census 2022 outside Government Buildings last month. Picture: Leah Farrell / RollingNews.ie

Census Night has arrived, the first in six years. But what is the purpose of the census, do I need to fill it out, and how do I do it?

Why do we have to fill out the census?