Substantial residues (up to 40 ppm) of methyl parathion were extracted from clothing worn in a treated cotton field on the 1st day following application. Delaying re-entry until the 2nd or 4th day following application reduced residues by about 90 and 99%, respectively, as compared to the 1st day. The amount of residue accumulated on clothing increased as the growing season progressed and the number of insecticide applications increased. The areas of clothing covering legs and arms collected the highest amount of residue. Methyl parathion penetrated through an outer layer of fabric onto an under layer. However the residue level on the 2nd layer was only about 50% of that present on the 1st layer. Methyl parathion residues extracted from cotton fabric amounted to only 50–75% of that extracted from cotton-polyester (50/50). Washing was effective in removing 75–95% of methyl parathion residues from clothing. Washing clean fabrics with those containing methyl parathion residues resulted in contamination of the clean fabrics.