North Down is located along the southern shores of Belfast Lough and is home to one of Northern Ireland's most affluent areas, Cultra.
The outgoing MP is Lady Hermon. She was the Ulster Unionists' only MP, but this time is running as an Independent.
Just over 61,000 people can vote here.
There is a higher than average life expectancy in this constituency.
It has the highest number of people who describe themselves as having no religion.
It is also home to the oldest pub in Ireland.
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