Wisbech is the second worst rated town in the country for integration in new analysis by think-tank Policy Exchange.
According to figures one in nine people in Wisbech was either born in Poland, Lithuania or Romania. That compares to one in 79 in Fenland as a whole excluding Wisbech.
The launch of the Integration Index compares 160 places across England and Wales and shows the Fenland town only second to neighbouring Boston when it comes to poor integration of its population.
To mark the launch of its new unit on demography, immigration and integration the think-tank analysed the most recent Census date (2011), producing the best and worst places in the country from the view point of integration.
It compares 160 places with a minimum population of 20,000 and a minimum no-white British minority population of 15 per cent.
The data examined 'identity integration' - how English minorities living in that area feel and 'structural integration' - how well minorities living in that area mix with other ethnic groups (working together, living in the same neighbourhoods).
With other EU countries included, the number of people living in Wisbech but born in the European Union is one in seven, that compares to one in 55 in Fenland as a whole excluding Wisbech.
A spokesman for Fenland District Council said: 'Like many places that have experienced high levels of migration, Wisbech has its issues and challenges. But there are also many examples of successful integration in schools, workplaces and elsewhere which show the positive contributions that Eastern Europeans of all ages make to the local community, both economically and culturally. It is a pity that all that good work is routinely overlooked.'
David Goodhart, head of Policy Exchange's Demography, Immigration and Integration Unit, said:
'Ethnic minority integration has shot up the political agenda in recent months and it is useful to know where the biggest challenges and the often quiet success stories actually are.
'As our index shows the integration picture is a mixed one but in some places people, of all backgrounds, fear that society is changing too fast and that too many people are living parallel lives. We know that people of similar backgrounds tend to cluster together but we also know that a good society needs a sense of trust and mutual regard that crosses social and ethnic boundaries.
'It is critical that this country retains its traditions of openness and individual rights and some sense of mutual regard between citizens. That is why the government should try to promote mixed communities.'
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here