ONF

ONF may refer to:


 * ONF (band), a South Korean boy band
 * Official National Front, a defunct political party in the United Kingdom
 * Office national des forêts, the French national forest agency
 * Ocala National Forest, in Florida
 * Old Northern French, another name for the Old Norman dialect
 * Open Networking Foundation, a nonprofit trade organization
 * All-Russia People's Front (Obshcherossiyskiy narodnyy front), a political organization
 * The National Film Board of Canada, Office national du film du Canada in French, a public organization