Northern Ireland Longitudinal Study

An insight into the people of Northern Ireland and their major life events spanning 40 years

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Northern Ireland Longitudinal Study

More than 100 projects have been carried out using the NILS

See all previous projects here

Northern Ireland Longitudinal Study

The data can provide evidence for research into social issues and the evaluation of government policies

See how the NILS has contributed to evidence-based policy


The Northern Ireland Longitudinal Study (NILS) is a wide-ranging database of people and their major life events, stretching back decades. Census information for 1981 to 2011 is linked with other administrative datasets such as vital events, school data, property information, health card registrations, weather and pollution amongst others.

The data can provide evidence for research into social issues and the evaluation of government policies.

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Project News

COVID-19 Update

Following on from the easing of restrictions from the NI Executive, NISRA plan on reopening the secure environment to researchers from Tuesday 1st June.  While this will initially be on a restricted basis, it is...

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NILS Univariate Synthetic Data

NILS Univariate Synthetic data can now be requested for a NILS project to facilitate remote writing of code without needing access to real data and the secure room.  Please note that timescales for producing the univariate...

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How to write a successful NILS application

We hope you are all staying safe and well during these times. Now, more than ever, health and social research will be essential to understanding and shaping the economic and societal recovery as we emerge...

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