Tannin concentrations in the seed coats of six peanut varieties grown in seven geographical locations for 2 years were determined. Tannin content within variety varied significantly between locations. Levels among varieties at a location were also variable. Tannin concentrations for a specific variety at a specific location in 1975 and 1976 were compared and 60% of the comparisons differed significantly. These data indicate that any resistance to Aspergillus parasiticus colonization associated with peanut seed coat tannin concentration would probably vary somewhat with production location and year.