About 90% of Ireland’s agricultural land area is used for grazing or hay and grass silage production. Livestock products account for more than half of the agricultural economy and make major contributions to exports. Until 2006, Ireland’s GHG inventory used a Tier 1 approach for all livestock emission sources. Enteric fermentation from cattle and sheep, and cattle manure management are key emission sources. Since 2006 a country-specific Tier 2 approach has been used for enteric fermentation and manure management emissions from cattle. This case study describes the countries approach for cattle, sheep, goats and swine.