General
An Taisce - www.antaisce.org
Archaeological Survey of Ireland - www.archaeology.ie
Coillte - www.coillte.ie
Dept. of Arts, Heritage and the Gaeltacht - http://www.ahg.gov.ie/heritage/
Dept. of Environment, Community and Local Government - www.environ.ie
Environmental Protection Agency - www.epa.ie
Inland Fisheries Ireland - www.fisheriesireland.ie
National Environmental and Sustainable Development Information Service - www.enfo.ie
National Inventory of Architectural Heritage - www.buildingsofireland.ie
National Library - www.nli.ie
National Monuments Service - www.archaeology.ie
National Museum - www.museum.ie
National Parks and Wildlife Service - www.npws.ie
Office of Public Works - www.opw.ie/en/heritage/
Ordnance Survery of Ireland - www.osi.ie
The Heritage Council - www.heritagecouncil.ie
Teagasc - www.teagasc.ie
Transport Infrastructure Ireland (Previously NRA) (for environmental works) - www.tii.ie/technical-services/environment/
Local Heritage
FenaghVisitors Centre - www.fenagh.com
Glenfarne - Ballroom of Romance -www.rainbowballroomofromance.com
Kiltyclogher Heritage Centre - https://www.facebook.com/Kiltyclogher-Heritage-Centre-950186531687810/
Leitrim Genealogy Centre - http://www.leitrimroots.com/
Leitrim Library - Local Studies - http://lm-vm-leitcms/eng/Community-Culture/Library/Local-Studies/
Manorhamilton Castle - www.manorhamiltoncastle.ie
Margeret of New Orleans - Birthplace - www.margaretsbirthplace.com
Sean MacDiarmada's Homestead - www.seanmacdiarmada.ie
St. George's Visitor & Heritage Centre - www.carrickheritage.com
Archaeology, Built Heritage and Industrial Heritage
An Taisce - www.antaisce.org
Archaeological Survey of Ireland - www.archaeology.ie
Association for Industrial Archaeology - http://industrial-archaeology.org/
Commissioner of Irish Lights - www.cil.ie
Database of Irish Excavation Reports - www.excavations.ie
Department of Arts, Heritage and the Gaeltacht - national policy on built heritage and architecture - www.ahg.gov.ie/heritage/built-heritage/
Dry Stone Wall Association of Ireland - www.dswai.ie/
Engineers Ireland Heritage Society - www.engineersireland.ie/Groups/Societies/Heritage-Society.aspx
Group for the Study of Irish Settlements - http://irishsettlement.ie/
Industrial Heritage Association of Ireland - www.ihai.ie
Institute of Archaeologists of Ireland - www.iai.ie
Institute of Conservator-Restorers in Ireland - www.conservationireland.org/
Irish Architectural Archive - www.iarc.ie
Irish Georgian Society - www.igs.ie
Irish Post-Medieval Archaeology Group - www.ipmag.ie
Irish Railway Record Society - www.irrs.ie
Irish Workhouses - www.workhouses.org.uk/Ireland/
National Inventory of Archiectural Heritage - www.buildingsofireland.ie
Office of Public Works - www.heritageireland.ie
Railway Preservation Society of Ireland - www.steamtrainsireland.com
Royal Institute of Architects of Ireland - www.riai.ie
Transport Infrastructure Ireland (Previously the NRA) - archaeology - www.tii.ie/technical-services/archaeology/
Historical Heritage, Folklore, Archive and Genealogy
Cultural Heritage Ireland - http://www.culturalheritageireland.ie/
Genealogy Advisory Service - National Library of Ireland - www.genealogy.nationalarchives.ie
Historical Mapping - Ordnance Survey of Ireland - www.osi.ie
Industrial Heritage Association of Ireland - www.ihai.ie
Irish Society of Archives - http://www.irishsocietyforarchives.com/
Military Archives, Dept. of Defense - http://www.militaryarchives.ie/home
National Folklore Collection - www.ucd.ie/folklore/en
National Folklore - www.duchas.ie/en/info/cbe
National Library - www.nli.ie
National Museum - www.museum.ie
National Television and Radio Archives - www.rte.ie
Oral History Network of Ireland - www.oralhistorynetworkireland.ie
Natural Heritage & Biodiversity
All Ireland Invasive Species Awareness - www.invasivespecies.ie
Biodiversity Watch Project - www.biology.ie
Birdwatch Ireland - www.birdwatchireland.ie
Crann - Trees for Ireland - www.crann.ie
Geological Survey of Ireland - www.gsi.ie
Green Schools Ireland - www.greenschoolsireland.org/resources/biodiversity.217.html
Hedge Laying Association of Ireland - www.hedgelaying.ie
Irish Peatland Conservation Council - http://www.ipcc.ie/
Irish Seedsavers - http://www.irishseedsavers.ie/
Irish Whale and Dolphin Trust - www.iwdg.ie
Irish Wildlife Trust - www.iwt.ie
National Biodiversity Data Centre - www.biodiversityireland.ie/
National Environmental and Sustainable Information Service (ENFO) - www.enfo.ie
National Parks and Wildlife Service Manuals - www.npws.ie/publications/irishwildlifemanuals/
Native Woodland Trust - www.nativewoodlandtrust.ie/
Notice Nature - www.noticenature.ie
The Heritage Council - www.heritagecouncil.ie
The Irish Landscape Institute - www.irishlandscapeinstitute.com
The Marine Institute - www.marine.ie
Transport Infrastructure Ireland - www.tii.ie/technical-services/environment/
Tree Council - www.treecouncil.ie
If there are inaccuracies in any of the above please notify Aoife Mulcahy at amulcahy@leitrimcoco.ie