She said the staff would be visiting these homes with both the access code and the paper forms, so people had the choice of how to complete the Census.
The spokesperson said the remaining 96 per cent of households in Northland had received access code letters, either in the post or delivered by a field officer.
She said of that 96 per cent, those who hadn't completed the Census yet had been sent a reminder letter.
After that, if those people still hadn't completed it, she said officials would visit them.
About 40 Census staff were working in Northland.
The spokesperson said the Kerikeri hub office, in Hobson Ave, will also be open from Monday to Friday from 1-4pm and Saturday 9am to 3pm for anyone who wants to pop in and do their Census.
Meanwhile, Whangarei SeniorNet have extended their offer to help those over 50 fill out their forms online.
Chairwoman Barbara Budgen said the offer was still there for people who had received their code after Census Day on March 6.
She said all people needed to do was call SeniorNet and leave their name and phone number, and someone would call them back and arrange a time.
She said the service was open to anyone, not just those who belong to the group.
Ms Budgen said SeniorNet club members who were computer savvy had helped around 50 people complete the Census so far.
To book in a time with Whangarei SeniorNet call 4383418.