The primary objective of this study was to investigate the effect of cellulosic fiber on the physical and mechanical properties of starch acetate foams. Corncobs were selected as the cellulose source because corn is the most abundant source of starch, and the cobs are rich in cellulose and hemicellulose. Because cellulose, lignin and hemicelluloses form strong linkages, it was expected that starch acetate–cellulose fiber blends would produce foams with good performance properties. A secondary objective was to characterize the radial expansion ratio, unit density, bulk density, unit spring index, bulk spring index, compression strength, and water absorption index of starch acetate–cellulosic fiber composites.