A poll conducted by ICM for anti-national ID card group NO2ID shows almost two-thirds of the public are opposed to the government database behind the scheme.
Asked by ICM what they thought of storing information on large computer systems and sharing it between different parts of government, 65% believed it was a bad idea, while just 31% said it was a good idea.
Phil Booth, NO2ID's national co-ordinator, said, "Support for ID cards is already under 50%. Even the government's own biased surveys now show falls in support. The more people know, the less they like it.
"Once it is common knowledge that the ID scheme is designed to pass around the information it collects about you, then it is politically doomed."
ICM Research interviewed a random sample of 1,001 adults aged 18+ by telephone.
NO2ID has just launched a video campaign on YouTube to highlight the database behind the card and "what it will do to real people's lives".