The dataset provide data supporting the findings of the above publication (Chang et al., 2019). The dataset contains global, regional and country level data of 1) feed intake (dry matter) by livestock (poultry, pigs and ruminants), 2) C3-C4 diet composition of domestic ruminants, 3) enteric methane emissions from ruminants, and 4) the δ13CCH4 source signature of the methane emissions. Annual data for the period 1961-2012 are provided.