Ysgol Gymraeg Nant Gwenlli has its own Shadow Governing Body. The Governors meet about twice a term and it is made up of L.A. representatives, Parents, Teachers as well as Community governors. All members serve for a 4 year term, elections are held for parent governors when terms of office come to an end. All parents at the school have the right to vote, as well as stand for election if they wish.
When fully constituted this governing body is made up as follows:
| LA Representatives | 3 | Parent Governors | 4 |
| Community Governors | 3 | Clerk | 1 |
| Teacher Governor(s) | 1 | Staff Representative | 1 |
| Head Teacher | 1 | Total | 14 |
The following people are currently members of the Governing Body:
