Census Day is on 21 March, when everyone in the country has to fill in a questionnaire about themselves and their families.
The census is held every ten years, and by taking part and telling the Office for National Statistics (ONS) about yourself, you will help make sure you and your community get the services and support you need.
The census will ask you about your ethnicity, religion and national identity and, for the first time, there will be voluntary questions about sexual orientation and gender identity for over 16s.
The census will also ask if you’ve served in the UK Armed Forces.
This will help identify the numbers, locations and ages of our armed forces community and show where resources are needed to make sure those who have served, and their families, are treated fairly.
You can fill your census in online as soon as soon as you get your access code in the post, which will be in March.
If you do not feel comfortable filling in the same form as the rest of your household, you can request an individual census questionnaire and answer separately.
If you, or anyone you know, needs help or advice, visit www.census.gov.uk