Germans gave the most accurate answer when asked about the percentage of the population who are Christians. Their average guess and answer were a perfect match at 58 percent.
Bobby Duffy, managing director of Ipsos MORI Social Research Institute, said: “These misperceptions present clear issues for informed public debate and policy-making.
"For example, public priorities may well be different if we had a clearer view of the scale of immigration and the real incidence of teenage mothers.
"People also under-estimate 'positive' behaviours like voting, which may be important if people think it is more 'normal' not to vote than it actually is."
More than a thousand volunteers aged between 16 and 64 were quizzed in each country by pollsters, except in the US and Canada where all participants were over 18.