The levels of 6 NDL-PCBs (non-dioxin-like-polychlorinated biphenyls) of were measured in some of Iranian dairy products (yogurt, doogh and kashk). A total of 120 samples were evaluated by modified QuEChERS extraction and gas chromatography-triple-quadrupole mass spectrometry (GC-QqQ-MS/MS) method, also RSD and recovery were determined, 6.33–8.86 and 97.45–102.63 %, respectively. The outcomes of our research exhibited the average levels of Ʃ6-NDL-PCBs in all samples were 15.17±3.44 ng/g fat that were lower than the standard level established by EU (40 ng/g fat). Also, results showed kashk samples had maximum mean level of 6-NDL-PCBs (18.66±2.42 ng/g fat) and doogh samples had minimum mean level of 6-NDL-PCBs (12.21±2.22 ng/g fat). The mean level of 6-NDL-PCBs in yogurt samples was 14.65±2.02 ng/g fat. The heat map results depicted the correlation between spectral indicators 6-NDL-PCBs in different dairy products. A risks assessment based on the Monte Carlo method was done by calculating the Estimated Daily Intake (EDI) and Incremental Life Cancer Risk (ILCR) by the technique of Monte Carlo. The EDI values of 6 NDL-PCBs based on the 95 percentile in yogurt, doogh and kashk were 14.3, 1.49 and 0.5 ng/kg.day, respectively. According to the calculated 95 percent ILCR, dietary exposure to 6 NDL-PCBs does not pose a risk to Iranian consumer health.