In the framework of Lebanon’s Third National Communication (TNC) to the United Nations Framework Convention on Climate Change (UNFCCC), Greenhouse Gas (GHG) emissions resulting from the agriculture sector in Lebanon were estimated for the years 2005 through 2012. Calculations were made using the Revised 1996 Intergovernmental Panel on Climate Change (IPCC) Guidelines for National Greenhouse Gas Inventories (IPCC, 1997) and the 2000 Good Practice Guidance (GPG) and Uncertainty Management in National Greenhouse Gas Inventories (IPCC, 2000). The tier 1 approach of the IPCC guidelines was adopted in the calculation of GHG and consequently for the development of the national greenhouse gas inventory.