MCLB
| Acronym | Definition |
|---|---|
| MCLB | Marine Corps Logistics Base (US DoD) |
| MCLB | Motorcycle Club Lederbaeren Berlin (German: Leather Bear Motorcycle Club Berlin; Berlin, Germany) |
| MCLB | Middlesex County Library Board |
| MCLB | Multi-Column List Box (computing) |
| MCLB | Multi-Channel Learning Base (UNESCO) |
| MCLB | Most Children Left Behind |