ILF may refer to:

• Ilford Airport, the IATA code for the airport in Canada
• Indiana Library Federation, professional association for librarians
• Industry Liaison Forum of the International AIDS Society
• Inferior longitudinal fasciculus, a nerve bundle in the brain
• Innocent Lives Foundation, an organization dedicated to unmasking anonymous online child predators to help bring them to justice.
• International Lacrosse Federation
• International Landworkers' Federation, a former global union federation
• Interactive Life Forms, the parent company of Fleshlight brand products.
• International Lifeboat Federation now the International Maritime Rescue Federation
• Ilya Ilf, a Russian writer.
• Interactive Literature Foundation, the predecessor to the Live Action Roleplayers Association
• Institute for Law and Finance, graduate law school of the Johann Wolfgang Goethe University Frankfurt am Main, Germany
• International Literacy Foundation, an international charity founded in 2010 with the aim of tackling illiteracy
• Institut Lean France, non-profit organization that aim to promote lean thinking, member of the LGN (Lean Global Network)
• International Limb Fittings, a recurve bow limb attachment system.
• Islamabad Literature Festival, an annual international literary festival held in Islamabad, Pakistan