And those attending are more likely to be women than men - with single men attending less than those with partners.
The survey, commissioned by Single Christians and Christian Vision for Men in partnership with Premier Christian Radio, shows that the unpartnered society attend places of worship less regularly - in particular the unpartnered men.
The YouGov survey, carried out on-line among 7,212 [16+] adults, found that:
- 62% of regular church attendees are middle class.
- Only 38% are working class.
- 17.4% of married 'working class' men in the UK never attend church.
- 9.3% of married 'middle class' men in the UK never attend church.
Speaking about the findings, Carl Beech from Christian Vision for Men said: "The church has singularly failed to engage with working class men, and men of all social classes particularly when they don't feel a reason to attend once their children are no longer dependent.
"Particularly painful is the statistical reality that a huge number of Christian women currently won't be able to have a Christian marriage in the current UK church.
This is an urgent wake up call."
CVM is calling on churches to find new ways of reaching out to working class men.
The organisation has linked up with Premier to help churches form 'Sheds' - men's groups that engage in masculine pass-times and 'introduce their mates to Jesus'.