evidence: The cost of living in Northern Ireland is $1667, which is 1.23 times less expensive than the average in the United Kingdom. Northern Ireland ranked 9th most expensive and 4th best state to live in the United Kingdom. [...] We calculate prices for Northern Ireland as a weighted mean for the population of 6 cities. Since large cities tend to have a higher cost of living, it's better to visit specific city pages for more relevant information.