Pembrokeshire is the fifth-largest county in Wales, but has more scheduled monuments (526) than any except Powys. This gives it an extremely high density of monuments, with 33.4 per 100 km². (Only the tiny county boroughs of Newport and Merthyr Tydfil have a higher density). With three-quarters of its boundary being coastline, Pembrokeshire occupies the western end of the West Wales peninsular, terminating with the tiny cathedral city of St David's. It was a historic county in its own right but between 1975 and 1996 it joined Carmarthen and Ceredigion in the much larger county of Dyfed.

Over two thirds of Pembrokeshire's scheduled monuments (346) date to pre-historic times. Even this is too many entries to conveniently show in one list, so the list is subdivided into three, separating the Roman to modern on one list, and subdividing the prehistoric sites along the lines of the former local districts of Preseli Pembrokeshire, (the northern half) and South Pembrokeshire. (These former districts ceased to exist as administrative units in 1996 when Pembrokeshire became a unitary authority, but the boundaries are a convenient way to sub-divide the list.)

There are 233 prehistoric scheduled sites in the northern area. They include hill forts, promontory forts on both coastal headlands and inland locations. It also includes a variety of enclosures, hut sites and Raths, a wide range of burial sites and other ritual and religious sites listed as barrows and chambered tombs, stone circles and standing stones. The list of 113 prehistoric sites in south Pembrokeshire contains a similar range.

The whole county's 182 Roman, medieval and post-medieval sites are all included in the third Pembrokeshire list, which covers inscribed stones, stone crosses, holy wells, bridges, castles, mottes and baileys, priories, chapels and churches, houses, town walls and a Bishop's palace, along with a wide variety of post-medieval sites from coalmines, kilns and dovecotes through to World War II defensive structures.

Scheduled monuments have statutory protection. The compilation of the list is undertaken by Cadw Welsh Historic Monuments, which is an executive agency of the National Assembly of Wales.^[1] The list of scheduled monuments below is supplied by Cadw^[2] with additional material from Royal Commission on the Ancient and Historical Monuments of Wales and Dyfed Archaeological Trust.

• List of prehistoric scheduled monuments in north Pembrokeshire
• List of prehistoric scheduled monuments in south Pembrokeshire
• List of Roman-to-modern scheduled monuments in Pembrokeshire

• Lists of scheduled monuments in Wales

v t e Pembrokeshire
Principal settlements	Fishguard Goodwick Haverfordwest Milford Haven Narberth Newport Neyland Pembroke Pembroke Dock St Davids Tenby
Towns and villages	Ambleston Amroth Angle Blaenffos Boncath Brawdy Burton Camrose Carew Castlemartin Cilgerran Clydau Clynderwen Cosheston Crymych Cwm Gwaun Dale Dinas Cross East Williamston Eglwyswrw Fishguard Freystrop Haverfordwest Hayscastle Herbrandston Hook Hundleton Jeffreyston Johnston Kilgetty/Begelly Lampeter Velfrey Lamphey Letterston Llanddewi Velfrey Llandissilio Llangwm Llanrhian Llanstadwell Llawhaden Lydstep Haven Maenclochog Manorbier Manordeifi Marloes and St Brides Martletwy Mathry Merlin's Bridge Milford Haven Mynachlog-ddu Narberth Nevern New Moat Neyland Nolton and Roch Pembroke Pembroke Dock Penally Porthgain Puncheston Rosemarket Rudbaxton Saundersfoot Scleddau Slebech Solva Spittal St Davids and the Cathedral Close St Dogmaels St Florence St Ishmael's St Mary Out Liberty Stackpole Stepaside Tavernspite Templeton Tenby The Havens Tiers Cross Trecwn Trefasser Walwyn's Castle Wisemans Bridge Wiston Wolfscastle Woodstock
Castles	Carew Castle Cilgerran Castle Cresswell Castle Dale Castle Haverfordwest Castle Llawhaden Castle Manorbier Castle Narberth Castle Newport Castle Pembroke Castle Picton Castle Roch Castle Rudbaxton Rath Tenby Castle Upton Castle Wiston Castle Wolf's Castle
Historic cantrefi and hundreds	Castlemartin Hundred Cemais Hundred Cilgerran Hundred Dewisland Hundred Dungleddy Hundred Narberth Hundred Roose Hundred Cantref of Cemais Cantref of Emlyn Cantref of Gwarthaf Cantref of Penfro
Islands and headlands	Bishops and Clerks Caldey Island Cemaes Head Crow Rock Dinas Island Emsger Gateholm Grassholm Middleholm Ramsey Island St Catherine's Island Strumble Head Skokholm Skomer St Margaret's Island Strumble Head Ynys Bery
Rivers	Afon Cych River Gwaun Western Cleddau Eastern Cleddau River Cleddau River Nevern Pembroke River River Teifi River Syfynwy
Attractions	Bluestone Blue Lagoon Water Park Folly Farm Adventure Park and Zoo Manor House Wildlife Park Oakwood Theme Park Pembrokeshire Coast National Park
Topics	Cuisine of Pembrokeshire Listed buildings Grade I Grade II* Registered parks and gardens Parliamentary constituencies Places Scheduled monuments SSSIs Schools Country houses Lord Lieutenants High Sheriffs Museums Public art