An efficient and rapid gas chromatographic method has been developed for the analysis of 2-chloro, 3-chloro, and 4-chloroethylbenzene isomers using 25 meter, 320 micron BP-20 polyamide coated fused silica capillary column. Quantitative analysis has been carried out using the external standard method. Also, the minimum detectable amount of 4-chloroethylbenzene has been established.