The 2004 list of the 50 Best Companies to Work for in Ireland was produced by the Great Place to Work® Institute Ireland & Discovery Research and published by The Irish Independent. The Top 10 Companies are marked in bold below, but otherwise companies are listed in alphabetical order only. Five special awards were announced in the fields of: Credibility, Respect, Fairness, Pride, and Camaraderie.
| | Companies |
| | Abbott Laboratories Ireland |
| | ACC Bank |
| | Allianz Ireland |
| | Appleby Jewellers |
| | Arup Consulting Engineers |
| | Ballina Beverages |
| | Bank of Scotland Ireland |
| | Boston Scientific Ireland |
| | Boston Scientific Tullamore |
| | BrightWater Selection |
| | BUPA Ireland |
| | Campbell Catering Services |
| | Chubb Ireland |
| | Clontarf Castle Hotel |
| | Corporate Travel Partners |
| | Deloitte. |
| | Department of Enterprise Trade and Employment |
| | DePuy Ireland |
| | Diageo Ireland Demand |
| | DMG Services |
| | Dublin Bus |
| | Eagle Star Insurance Company |
| | EBS Building Society |
| | Fehily Timoney & Company |
| | Four Seasons Hotel Dublin |
| | GE Capital Aviation Services |
| | GlaxoSmithKline (Ireland) |
| | Guidant |
| | Halifax Insurance Ireland |
| | Heineken Ireland |
| | Hibernian Group |
| | Hilton Dublin |
| | Janssen Pharmaceutical |
| | MBNA Ireland |
| | Mentor Graphics Ireland |
| | Microsoft Ireland |
| | O2 Communications |
| | PEI |
| | Radisson SAS Group |
| | Royal & Sun Alliance |
| | Royal Bank of Scotland Group Technology |
| | Sodexho Catering and Support Services |
| | Statoil Ireland |
| | Superquinn |
| | Symantec Ireland |
| | The Civil Service Commission |
| | Transitions Optical |
| | Trócaire |
| | Watson Wyatt LLP |
| | Whirlpool SSC |
