Leinster — Province Overview Map

Daniel Kirkpatrick

Leinster Heritage Profile

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By

Daniel Kirkpatrick

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By
128 of 280 baronies 37,947 of 137,610 NMS sites 22,442 of 48,327 listed buildings 19,681 km²

Leinster is one of Ireland's four historical provinces, covering 128 of the Republic's 280 baronies across 12 counties: Carlow, Dublin, Kildare, Kilkenny, Laois, Longford, Louth, Meath, Offaly, Westmeath, Wexford, Wicklow. The dated archaeological record is dominated by the Early Medieval period, which accounts for 35% of period-attributed sites. The most prevalent single monument type is Enclosure (4,978 records). Mean elevation across the province is 107m, between the upland and lowland extremes of the other provinces.

Heritage at a glance

128
of 280 ROI baronies
37,947
NMS sites
of 137,610 ROI total
22,442
NIAH listed buildings
of 48,327 ROI total
19,681 km²
province area

Archaeological character

The National Monuments Service Sites and Monuments Record holds 37,947 archaeological sites across the 128 baronies of Leinster, of which 33,873 (89%) sit within a formally recorded protection zone. In absolute terms this is the second-highest of the four provinces for total recorded archaeological sites. The record is led by defensive sites — ringforts, enclosures, hillforts, and stone forts, making up around 52% of the categorised sites in the province. Within Leinster, the record is relatively evenly spread across baronies. The three baronies holding the largest share of the record by absolute count are Garrycastle (Offaly) (2,146 sites), Gowran (Kilkenny) (1,059), and Rathconrath (Westmeath) (686) — together accounting for around 10% of the province's archaeological record. Adjusted for area, the highest site density is in Drogheda (Louth) at 5.9 sites per km², reflecting an unusually heritage-rich landscape rather than simply a large barony with many sites overall.

Largest by total recorded sites

  1. Garrycastle Offaly · 2,146 sites
  2. Gowran Kilkenny · 1,059 sites
  3. Rathconrath Westmeath · 686 sites

Highest density (sites per km²)

  1. Drogheda Louth · 5.9 /km²
  2. Philipstown Lower Offaly · 5.2 /km²
  3. Garrycastle Offaly · 5.1 /km²

Most common monument types

TypeCount
Enclosure 4,978
Ringfort – rath 4,879
Structure – peatland 1,648
Church 1,606
Graveyard 1,368
Ring-ditch 1,202
Cross-slab 1,074
Road – class 3 togher 940

Chronological character

Dated archaeological evidence across Leinster runs from the Mesolithic through to the Modern, spanning 9 of 9 canonical archaeological periods. Activity concentrates most heavily in the Early Medieval (9,595 sites, 35% of dated material). A further 12,085 sites (31% of the overall NMS record for Leinster) carry no period attribution — typically records pre-dating the standardised period vocabulary or awaiting specialist dating review.

Mesolithic
42
Neolithic
526
Early Bronze Age
2,545
Middle Late Bronze Age
1,988
Iron Age
8,648
Early Medieval
9,595
Medieval
3,127
Post Medieval
584
Modern
265
Unknown
12,085

Architectural heritage

The National Inventory of Architectural Heritage records 22,442 listed buildings across Leinster, appraised on a five-tier scale from Record-Only through Local, Regional, National, and International. Of these, 8 carry an International grading (buildings of European architectural importance) and 522 are graded National. This makes Leinster the highest of the four provinces for listed-building count. The single largest concentration of listed buildings is in Dublin (Dublin) with 4,576 records — around 20% of the province's NIAH total.

Largest by listed-building count

  1. Dublin Dublin · 4,576 listed buildings
  2. Forth Wexford · 789 listed buildings
  3. Coolock Dublin · 721 listed buildings

Terrain and environment

The mean elevation across Leinster is 107m. Mean slope is 3.8°, the lowest of the four provinces. The Topographic Wetness Index averages 10.9 across the province, the highest of the four provinces. High wetness is significant for heritage: waterlogged ground preserves organic archaeology — wooden trackways, leather, textiles — far better than free-draining soil. The land-cover mosaic is dominated by improved grassland (68%), woodland (16%), and arable farmland (11%).

Terrain measurements

Mean elevation106.6 m
Max elevation922.8 m
Mean slope3.75°
Wetness index (TWI)10.90
Grassland67.6%
Woodland16.4%
Cropland11.4%
Urban land2.8%

Geology and preservation

Bedrock geology shapes the landscape long before any settlement begins — controlling soil drainage, agricultural potential, the survival of upstanding monuments, and the preservation of buried archaeology. The figures below are area-weighted aggregates of the per-barony bedrock data, drawn from the Geological Survey Ireland 1:100,000 bedrock map.

The bedrock underlying Leinster is predominantly limestone (44% of the province by area), laid down during the Carboniferous period (58% of the province). Limestone is the most heritage-rich bedrock in Ireland. It supports fertile, well-drained soils that favoured dense Early Medieval ringfort agriculture and Norman manorial estates, and it weathers into karst features — sinkholes, caves, swallow holes, and souterrains — that frequently carry archaeology.

Dominant geological periodCarboniferous (58%)
Dominant rock typeLimestone (44%)

Placename heritage

Logainm records 14,749 placenames across the baronies of Leinster, predominantly townland names. Of these, 2,407 (16%) carry one of the diagnostic Gaelic roots tracked by the heritage classifier — defensive (ráth-, lios-, dún-, caiseal-), ecclesiastical (cill-, teampall-, domhnach-), burial-ritual, or Norse-contact terms. The dominant stratum is Early Christian ecclesiastical (1,390 names), with pre-Christian / Early Medieval defensive (870) forming a strong secondary layer. The single most common diagnostic root is cill- (church), appearing in 1,003 placenames across the province.

Baronies in Leinster

BaronyCountykm²NMSNIAHDominant period
CarlowCarlow12745558Iron Age
ForthCarlow16020533Iron Age
Idrone EastCarlow19538265Iron Age
Idrone WestCarlow9315927Iron Age
RathvillyCarlow18128450Early Medieval
SlievemargyCarlow112Iron Age
St. Mullin's LowerCarlow10825345Early Bronze Age
St. Mullin's UpperCarlow322711Iron Age
Balrothery EastDublin122480177Iron Age
Balrothery WestDublin10217057Iron Age
CastleknockDublin68123673Iron Age
CoolockDublin71254721Iron Age
DublinDublin024,576Unknown
NethercrossDublin89296107Iron Age
NewcastleDublin92209366Medieval
RathdownDublin127422517Iron Age
UppercrossDublin137204337Early Bronze Age
CarburyKildare19517754Early Medieval
ClaneKildare13015836Iron Age
ConnellKildare141135135Iron Age
Ikeathy And OughteranyKildare10417559Iron Age
KilcullenKildare347728Iron Age
Kilkea And MooneKildare188509106Iron Age
Naas NorthKildare103209202Iron Age
Naas SouthKildare11117077Iron Age
Narragh And Reban EastKildare8718484Iron Age
Narragh And Reban WestKildare90173195Iron Age
Offaly EastKildare190422183Early Bronze Age
Offaly WestKildare164167134Iron Age
Salt NorthKildare89185264Early Medieval
Salt SouthKildare6813928Iron Age
CallanKilkenny239284Medieval
CrannaghKilkenny236571189Iron Age
FassadininKilkenny276511180Iron Age
GalmoyKilkenny16352269Iron Age
GowranKilkenny4541,059614Iron Age
IdaKilkenny24929663Medieval
IverkKilkenny167245179Early Medieval
KellsKilkenny15529770Early Medieval
KilculliheenKilkenny927156Middle-Late Bronze Age
KnocktopherKilkenny18930679Early Medieval
ShillelogherKilkenny151625388Iron Age
BallyadamsLaois9815616Iron Age
ClandonaghLaois17724239Early Medieval
ClarmallaghLaois17628149Iron Age
CullenaghLaois17817989Iron Age
Maryborough EastLaois102129199Iron Age
Maryborough WestLaois17010045Early Medieval
PortnahinchLaois14515297Iron Age
SlievemargyLaois14310118Iron Age
StradballyLaois11316249Iron Age
TinnahinchLaois22010068Early Medieval
UpperwoodsLaois19810623Iron Age
ArdaghLongford163322235Early Medieval
GranardLongford270445136Early Medieval
LongfordLongford235286197Early Medieval
MoydowLongford14065764Early Medieval
RathclineLongford198619109Early Medieval
ShruleLongford8518195Early Medieval
ArdeeLouth218486183Iron Age
DroghedaLouth19109306Medieval
Duleek LowerLouth5525Early Medieval
Dundalk LowerLouth155447186Early Medieval
Dundalk UpperLouth126543415Early Medieval
FerrardLouth200442184Iron Age
LouthLouth10430848Early Medieval
Deece LowerMeath8114024Iron Age
Deece UpperMeath11613516Iron Age
Duleek LowerMeath150384111Early Medieval
Duleek UpperMeath11633437Iron Age
DunboyneMeath6817721Iron Age
ForeMeath176501126Early Medieval
Kells LowerMeath14623460Early Medieval
Kells UpperMeath200413145Early Medieval
LuneMeath16213656Iron Age
MorgallionMeath12724538Early Medieval
Moyfenrath LowerMeath16424278Iron Age
Moyfenrath UpperMeath12816839Medieval
Navan LowerMeath102229168Iron Age
Navan UpperMeath7220532Iron Age
RatoathMeath14533831Iron Age
SkreenMeath16540765Iron Age
Slane LowerMeath10616530Early Medieval
Slane UpperMeath11838567Neolithic
BallyboyOffaly13111231Early Medieval
BallybrittOffaly219339369Iron Age
BallycowanOffaly157235177Early Medieval
ClonliskOffaly199264102Early Medieval
CoolestownOffaly194194102Iron Age
EglishOffaly11616517Iron Age
GarrycastleOffaly4202,146140Early Medieval
GeashillOffaly12511367Iron Age
KilcourseyOffaly7811361Iron Age
Philipstown LowerOffaly12464052Iron Age
Philipstown UpperOffaly15017246Iron Age
WarrenstownOffaly8712328Iron Age
Athlone SouthWestmeath34290Medieval
BrawnyWestmeath4659100Early Medieval
ClonlonanWestmeath130252114Early Medieval
CorkareeWestmeath10935770Early Medieval
DelvinWestmeath158242100Early Medieval
FarbillWestmeath143256112Early Medieval
FartullaghWestmeath159306131Early Medieval
ForeWestmeath213482140Early Medieval
Kilkenny WestWestmeath15226065Early Medieval
Moyashel And MagheradernonWestmeath174475284Early Medieval
MoycashelWestmeath191624181Early Medieval
MoygoishWestmeath163296110Early Medieval
RathconrathWestmeath195686121Early Medieval
Ballaghkeen NorthWexford185166126Iron Age
Ballaghkeen SouthWexford166248160Iron Age
BantryWexford413631479Early Bronze Age
BargyWexford174317147Iron Age
ForthWexford168467789Iron Age
GoreyWexford331444229Iron Age
IdaWexford1521Medieval
ScarawalshWexford432455456Iron Age
ShelburneWexford216408183Iron Age
Shelmaliere EastWexford797179Iron Age
Shelmaliere WestWexford206328172Iron Age
ArklowWicklow272462157Iron Age
Ballinacor NorthWicklow30040883Early Medieval
Ballinacor SouthWicklow31719688Iron Age
NewcastleWicklow212363143Medieval
RathdownWicklow134245539Iron Age
ShillelaghWicklow18019882Iron Age
Talbotstown LowerWicklow35847892Iron Age
Talbotstown UpperWicklow253351110Iron Age

About this profile

Click any section below to expand.

What is a province?

Ireland’s four historical provinces — Ulster, Munster, Leinster, and Connacht — are pre-modern territorial groupings dating in form to the early medieval period and codified later in the Norman and Tudor administrative reforms. Each province aggregates a fixed set of counties and (for the Republic) a fixed set of baronies. This profile aggregates the per-barony heritage data within Leinster to give a province-level analytical picture.

Data coverage

This profile aggregates the per-barony heritage data for the 128 Leinster baronies in the Republic of Ireland, covering the counties of Carlow, Dublin, Kildare, Kilkenny, Laois, Longford, Louth, Meath, Offaly, Westmeath, Wexford, Wicklow. The underlying data is drawn from three primary state registers: the National Monuments Service (NMS) Sites and Monuments Record for archaeological sites, the National Inventory of Architectural Heritage (NIAH) for listed buildings, and Logainm for placename heritage. Terrain and geology statistics are derived from the EURODEM digital elevation model, ESA WorldCover land-cover classifications, and the Geological Survey Ireland 1:100,000 bedrock map.

What counts as a site?

This profile combines three distinct heritage registers, each with its own definition of what constitutes a recordable site:

  • Archaeological sites (NMS). The National Monuments Service Sites and Monuments Record catalogues every known archaeological monument or site of archaeological interest in the Republic — from prehistoric burial mounds and ringforts to medieval churches and post-medieval defensive works. A subset lies within a recorded protection zone, which gives those sites statutory protection under the National Monuments Acts.
  • Listed buildings (NIAH). The National Inventory of Architectural Heritage records buildings of architectural, historical, archaeological, artistic, cultural, scientific, social, or technical interest, appraised on a five-tier scale from International through National, Regional, Local, and Record-Only.
  • Heritage placenames (Logainm). A heritage-diagnostic classifier flags Irish-language townland names carrying roots that signal defensive sites, ecclesiastical foundations, prehistoric burial-ritual features, or Norse-contact settlement.
Editorial principles

The narrative sections of this profile follow several explicit principles:

  • Evidential. Every claim about this province’s heritage character is anchored in the underlying register data. Where a count, share, or comparative ranking is cited, it is computed from the source datasets at export time.
  • Comparative. Counts are reported alongside their rank among the four provinces and within-province distribution among baronies, so the reader can see whether a figure is unusual.
  • Transparent on limits. Coverage gaps and survey biases are flagged where they meaningfully affect the figures rather than hidden.
  • No interpretation beyond what the data supports. The narrative does not speculate about historical events or social dynamics beyond what the recorded heritage and placename evidence directly attests.
Data caveats and limits
  • NMS Sites and Monuments Record is the product of survey campaigns at different intensities across counties and decades. Absolute counts should be read in that light.
  • NIAH coverage is broadly complete for the Republic but was conducted on a rolling county-by-county basis. Recently built or recently demolished structures may not be reflected.
  • Logainm classification applies a deliberately conservative pattern-matching approach. A townland may carry a heritage signal the classifier doesn’t recognise.
  • Period attribution. The chronological distribution reflects only NMS sites with a recognised period attribution in the source data; sites listed as “Unknown” are surfaced in the bar chart but excluded from canonical period totals.
  • Bedrock geology is mapped at 1:100,000 scale, which means local variation within a barony is generalised. The dominant-system and rocktype figures are area-weighted.
Data sources
Spotted an error? This dataset is updated continuously. Email contact@danielkirkpatrick.co.uk with corrections, missing records, or suggestions for improvement.