OLA

OLA may stand for:
 * United Nations Office of Legal Affairs
 * Official Languages Act 2003, Ireland
 * Oklahoma Library Association
 * Online authorisation
 * Ontario Lacrosse Association
 * Ontario Legislative Assembly
 * Ontario Library Association
 * Open Learning Agency, British Columbia, Canada
 * Operational-level agreement in support of a service-level agreement
 * WebSphere Optimized Local Adapters, IBM software
 * Oregon Library Association
 * Oromo Liberation Army, armed opposition group in Ethiopia and former armed wing of the OLF
 * Ostseeland Verkehrs Gmbh, a Transdev Germany railway
 * Our Lady of the Abandoned Parish Church (Marikina), Philippines
 * Overlap–add method in signal processing
 * Overland Airways, ICAO airline code OLA
 * OLA Girls Senior High School (Ho), Ghana
 * OLA Girls Senior High School (Kenyasi), Ghana