List of companies of Ireland

This is a list of notable companies based in Ireland, or subsidiaries according to their sector.

Some entries on this list may be statutory corporations - a business form governed by a board appointed by an Irish Government minister under a particular piece of legislation - not formally companies as such, but are effectively treated as such and are included on this list as they are usually large business.

For more details on this form of governance, see state-sponsored bodies of Ireland.

These subsidiaries are listed because the Irish economy is significantly dependent on foreign companies in comparison to other nations and these multinational companies are major Irish employers and tax contributors - Intel Ireland employs over 5000 people.

This list includes notable companies with primary headquarters located in the country.