The Regions Beyond Missionary Union was a Protestant Christian missionary society founded by Henry Grattan Guinness, D.D. and his wife Fanny in 1873.

The name is a reference to the goal declared by Paul the Apostle in his Second Epistle to the Corinthians, "To preach the gospel in the regions beyond you". (2 Cor 10:16) The society issued a journal named "Regions Beyond".^[1]

RBMU merged with EUSA (Evangelical Union of South America) to form Latin Link in 1991. The Britain & Ireland and International offices of Latin Link are both based separately in Reading.

• Conley, Joseph F. (2000). Drumbeats that Changed the World. Pasadena: William Carey Library. ISBN 978-0878086030
• Pritchard, Elizabeth (1973). For Such a Time. Eastbourne: Victory Press. ISBN 978-0854761876
• Pritchard, Elizabeth (2008). Diary of a 'Whatnot'. Lisburn: Ulster Friends Home Mission.
• Holmes, Kenneth (1963). The Cloud Moves. London: RBMU.

• History of RBMU
• History of RBMU, captured July 22, 2011