Child Evangelism Fellowship (CEF) is an international interdenominational Christian nonprofit organization founded by Jesse Irvin Overholtzer (1877-1955) in 1937, headquartered in Warrenton, Missouri, United States. The organization lists its purpose as teaching the Christian Gospel to children and encouraging children's involvement in local Christian churches. It has programs established in all US states and in 192 countries, with 733 full-time workers in the US, an estimated 40,000 volunteers in the US and Canada, and over 1,200 missionaries overseas, approximately 1,000 of them national workers, individuals trained with CEF but local to the country of their service. During the reporting year ending December 2014, CEF reported teaching more than 19.9 million children, mostly through face-to-face ministry. CEF is a charter member of the Evangelical Council for Financial Accountability (ECFA).

CEF branched to Europe in 1947 when Bernard and Harriet Swanson (from USA) began work in Gothenburg, Sweden. CEF soon spread across Europe, most notably in (Northern) Ireland from 1950. The headquarters of CEF Europe are in Germany, with its missionaries trained at different centers across Europe.