Lisa Gwilym (born 17 June 1975) is a Welsh broadcaster who presents shows on BBC Radio Cymru and the Welsh language television channel, S4C.
Gwilym began her career at S4C in 1998 as a continuity presenter for the Planed Plant children's strand.
In October 2001, she joined the S4C live teen magazine programme Uned 5 (Unit 5) as a presenter. During her time on the show, she took part in the 2003 John Cooper Mini Challenge. She also co-presented a special documentary with then-colleague Gethin Jones from Madagascar. This was broadcast over the Christmas holidays in 2004. Beforehand, she announced on Friday 16 December that she was leaving her presenting role. Gwilym stayed at Antena Television (the producers of Uned 5) to work as a producer on the show.
Between April 2008 and December 2009, Gwilym presented S4C's now-defunct flagship arts programme, Sioe Gelf. In 2012, she was one of three presenters for the history series Darn Bach o Hanes. She also introduces ITV Wales's archive series Cofio. In 2013 she started presenting the live music series Y Stiwdio Gefn.
Gwilym has also presented and reported for S4C's coverage of the Welsh National Eisteddfod (in 2003, 2004 & 2009), the Brecon Jazz Festival, Sesiwn Fawr Dolgellau (Dolgellau's Big Session), Wakestock, the Tan y Ddraig (Dragon's Fire) concerts at Bryn Terfel's Faenol Festival and Hanner Cant, a music festival to mark the 50th anniversary of Cymdeithas yr Iaith Gymraeg. She has also been a live reporter for Children in Need's Welsh opt-out coverage and worked on BBC Radio 1's BBC Introducing opt-out in Wales.