A field experiment was conducted during the kharif seasons of 2009 and 2010 to evaluate the CROPGRO-Peanut model for phenological and yield attributes of three groundnut cultivars V1 -M 335 (Virginia spreading type), V2 -GG 20 (Virginia semi-spreading type) and V3 -GG 5 (Spanish bunch type) sown under three environments. Model output showed that the simulated values of phenology, growth parameters and pod yield of the groundnut cultivars were close to the corresponding observed values.