| OLMA | Office of Labour Market Adjustment (Australia) 
| Others |
| OLMA | Online Master of Arts (Virginia Tech; Blacksburg, VA)
| Others |
| OLMA | Ontario Lumber Manufacturers Agency
| Others |
| OLMA | Oregon Legal Management Association
| Others |
| OLMA | Ostschweizerische Land- und Milchwirtschaftliche Ausstellung (German: East-Swiss Agriculture and Dairy Farming Exposition; St.Gallen, Switzerland)
| Others |
| OLMA | Our Lady of Mercy Academy (est. 1928; Syosset, NY)
| Others |