OCM may refer to:
- OCM (gene), also known as LOC4951, a human gene
- Oriental Carpet Manufacturers, primarily an oriental rug manufacturing and trading company of Turkish-English Origin. In the 1980s it merged with two other giant rug companies to form Eastern Khayaam OCM before closing down.
- Ohio Community Media, a newspaper company in the United States
- Oil cleansing method, a skin-cleansing method
- Olympic Council of Malaysia
- One Caribbean Media
- Open Cloud Manifesto, also known as the Cloud Computing Manifesto
- Optical channel monitor, a device for optical performance monitoring in fiber-optic communications networks
- Oracle Certified Master, a designation in the Oracle Certification Program
- Oracle Configuration Manager, a service of Oracle Corporation
- Ordained Clergy Member, name honorific used by clergymen
- Organisation civile et militaire, a group of the French Resistance
- Organizational change management
- Original Component Manufacturer
- Outbound call management, automated call-center communications and software
- Outlook Calendar Meeting, a meeting scheduled using Microsoft Outlook
- Oxidative coupling of methane
- Object Content Mapping