OCF may refer to:

• Ocala International Airport, in Ocala, Florida
• Off Center Fed antenna, a dipole antenna with specific placement of feedpoint allowing multiple resonances in HF band
• Officers' Christian Fellowship, a nonprofit Christian parachurch organization which serves the U.S. Military
• Open channel flow, Flow of a fluid with its surface exposed to the atmosphere
• Open Cluster Framework, a clustering standard in computing
• Open Computing Facility, at University of California, Berkeley
• Open Connectivity Foundation, the biggest industrial connectivity standard organization for IoT.
• Open Container Format (also OEBPS Container Format) in the specification for E-Books in the ePUB format.
• OpenBSD Cryptographic Framework, an OpenBSD initiative to provide operating system support for cryptographic acceleration hardware.
• Operating cash flow, a term in financial accounting
• Optimum Coding in the Frequency Domain
• Ordinal collapsing function, a process used for reaching large ordinals in the field of set theory
• Ordnance Clothing Factory, Avadi, Shahjahanpur, India
• Oregon Country Fair, an annual event in Veneta, Oregon
• Original Composite Font, an early CJK font format by Adobe Systems
• Orthodox Christian Fellowship, a North American Orthodox campus ministry
• Our Common Future, a 1987 report from the United Nations World Commission on Environment and Development (WCED)
• Owens Corning Fiberglass, a manufacturer of fiberglass insulation
• Observable canonical form