Template:Scheduled monuments in Wales - English Wikipedia @ Freddythechick

North Wales

Mid Wales

West Wales

Carmarthenshire	Prehistoric Roman to modern
Ceredigion	Prehistoric Roman to modern
Pembrokeshire	Prehistoric (north Pembrokeshire) Prehistoric (south Pembrokeshire) Roman to modern

South Wales

Glamorgan^†	Bridgend Caerphilly Cardiff Merthyr Tydfil Neath Port Talbot Rhondda Cynon Taf Swansea Vale of Glamorgan
Gwent^‡	Blaenau Gwent Monmouthshire Newport Torfaen

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Key: † Historic county ‡ preserved county