The Central Statistics Office has called on selected households across six counties, who are participating in a pilot scheme, to fill out an online census form before Sunday.
The CSO selected 20,000 households in 44 locations in counties Cork, Dublin, Kilkenny, Louth, Mayo, and Offaly to participate in the Census Pilot Survey ahead of Census 2027.
Census 2027 will be the first census in Irish history in which the public will have the option to complete their form online.
Those participating in the initiative have until Sunday to fill out their census form.
Head of Census Administration Eileen Murphy said the new questions include areas such as mental health, overnight car parking, and questions on gender and sexual orientation.
"We're changing the idea of census night from de facto, which is where you are on the night of the Census, to where you usually live, where you're usually resident," she said.
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"So, we're asking people to fill it in where they usually live," she added.
Speaking on RTÉ's Morning Ireland, Ms Murphy said that not everyone will be able to do the census online, so the new version will be "a multi mode" version.
In relation to any GDPR issues around confidentiality using electronic devices, Ms Murphy said there are no concerns.
She said: "The Central Statistics Office has been trusted by Irish people for 75 years now, we're actually celebrating our 75th anniversary this year, to keep data safe and secure and it's at the core of everything we do.
"And as we move online, that's why we're building all these integrated systems and complex systems to make sure that everything is as secure as we can make it.
"And privacy by design is at the heart of everything we do."
Ms Murphy said an online and traditional paper version will be available during Census 2027.
She explained that the project has been funded by the EU and came after public consultation asking people what they wanted to be asked in the 2027 Census.
Ms Murphy encouraged people to give their feedback and say what worked and did not.
The CSO has urged all householders who received letters of invitation to take part this weekend.
However, it said members of public who have not received such a letter can still participate by visiting censuspilot.ie.
