In the framework of Lebanon’s Third National Communication (TNC) to the United Nations Framework Convention on Climate Change (UNFCCC), Greenhouse Gas (GHG) emissions’ trend resulting from the transport sector in Lebanon was estimated from 1994 to 2011. Calculations were made using the Revised 1996 Intergovernmental Panel on Climate Change (IPCC) Guidelines for National Greenhouse Gas Inventories and the 2000 Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories. The GHG emissions from the transport sector, namely carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), along with the indirect GHGs (carbon monoxide (CO), nitrogen oxides (NOx), sulphur dioxide (SO2) and non-methane volatile organic compounds (NMVOCs)) have been calculated in order to be reported to the UNFCCC as part of the TNC. The transport sector is divided into road transport, maritime transport, and aviation. Tier 2 was used for the calculation of emissions from road transport and tier 1 for the off-road transport, fisheries and yachts boats, and domestic aviation.