There are 18 Members within each NPA, made up of 12 Principal council members and 6 appointed Welsh Government members.
Mae 18 Aelod ym mhob un o’r Awdurdodau Parciau Cenedlaethol, sy'n cynnwys 12 Prif aelod o'r cyngor a 6 aelod penodedig o Lywodraeth Cymru.