Coal-fired power plants (CFPPs) are an important energy source and the major source of air pollutants as well as greenhouse gases (GHGs) in Vietnam. The emission data of air pollutants and GHGs are an important base for setting up control strategies and management policies. This study assesses the emissions of PM2.5, PM10, SO2, NOx, CO, CH4, N2O, and CO2 from CFPPs in Vietnam in 2019, and 2021 and predicts those in 2030 based on coal consumption and emission factors. A method to estimate PM2.5 and PM10 emission based on the emission of PM and size distribution was proposed to overcome the difficulty of lacking data and measuring those parameters in the flue gas in Vietnam.