| Acronym | Definition |
|---|
| OPOA➣Oregon Peace Officers Association |
| OPOA➣Oakland Police Officer's Association (Oakland, CA) |
| OPOA➣Ojibwa Property Owners Association (Weidman, MI) |
| OPOA➣Ohio Peak Oil Action |
| OPOA➣Oroville Police Officers Association (Oroville, WA) |
| OPOA➣Optical Parametric Oscillator Amplifier (optical technology) |