| PACA | Packard Automobile Club of Australia 
| Others |
| PACA | Pagans Against Child Abuse
| Others |
| PACA | Pakistan American Cultural Association
| Others |
| PACA | Pan African Community Association
| Others |
| PACA | Pan American Christian Academy
| Others |
| PACA | Participatory Analysis for Community Action
| Others |
| PACA | Partnership for Aflatoxin Control in Africa
| Others |
| PACA | Pasco Alliance for Community Associations
| Others |
| PACA | Pasco Alliance Of Community Associations
| Others |
| PACA | Pennsylvania Aggregates and Concrete Association
| Others |
| PACA | People Against Car Accidents
| Others |
| PACA | Per Annum Compounded Annually
| Others |
| PACA | Perishable Agricultural Commodities Act
| Others |
| PACA | Personal Alternative Communication Aid
| Others |
| PACA | Philadelphia Area Cooperative Alliance
| Others |
| PACA | Picture Archive Council of America
| Others |
| PACA | Plataforma Autocaravanas Autonoma
| Others |
| PACA | Play And Creative Activity
| Others |
| PACA | Polling Agent and Counting Agent
| Others |
| PACA | Polling Agent Counting Agent
| Others |
| PACA | Portslade Aldridge Community Academy
| Others |
| PACA | Preliminary Assessment and Corrective Action
| Others |
| PACA | Preservation and Conservation Association
| Others |
| PACA | Priority Access And Channel Assignment
| Others |
| PACA | Pro Am Collaborative Astronomy
| Others |
| PACA | Procuring Authority Competition Advocate
| Others |
| PACA | Professional Aerospace Contractors Association
| Others |
| PACA | Professional Alliance for Conservation of Agriculture
| Others |