Gwilym Meirion Jenkins (12 August 1932 – 10 July 1982) was a Welsh statistician and systems engineer, born in Gowerton (Welsh: Tregŵyr), Swansea, Wales.
He earned a first class honours degree in mathematics in 1953 followed by a PhD at University College London in 1956.
His first job after university was junior fellow at the Royal Aircraft Establishment.
His initial work concerned discrete time domain models for chemical engineering applications.
He served on the Research Section Committee and Council of the Royal Statistical Society in the 1960s, founded the Journal of Systems Engineering in 1969, and briefly carried out public duties with the Royal Treasury in the mid-1970s.