Census night is on Tuesday 11 August 2026.
The Census is the largest collection of data undertaken by the Australian Bureau of Statistics (ABS).
Emily Walter, Census National Spokesperson, said: "With less than 100 days until the 2026 Census, it's a good time to remind people why every answer matters.
"The Census provides some of the country's most valuable statistics. It's a snapshot of who we are and how we are changing, informing what we need now and into the future."
Census data informs planning for schools, health care, transport and infrastructure. It is also used to help plan local services for individuals, families and communities.
"An example of the importance of Census data can be seen in how Playgroup Australia uses it to understand emerging community needs and modern Australian families," Ms Walter said.
"Census data helps them plan the timing and locations of playgroups to accommodate working parents, while also identifying gaps in their network.
"Playgroups have become more vital than ever for providing trusted, community-based spaces that support early childhood development, social connection and parental wellbeing."
The ABS has been preparing to make sure everyone in Australia can take part in the Census.
"The ABS will provide a range of ways for the public to complete the Census this year, including online or via a paper form," Ms Walter said.
"Additional support will also be available for people who need it, including Census field staff, phone and online services, information hubs in public spaces and translated material."