Thrips tabaci (Lind.) is one of the most important insect pests which damage all stages of onions. Therefore, present study was conducted at experimental field of Entomology Section, Agriculture Research Institute, Tandojam during cropping season 2018. The four indigenous onion varieties of Sindh, Pakistan Phulkara, Ghotki, Naserpur and Thano Bulla Khan was used in the study as its nursery was obtained from the Onion Research Station, Husri. Experiment was arranged in a RCBD design with five replications. The observations were taken fifteen onion plants from each treatment per replication. The population of T. tabaci appeared on onions since its transplanting on all varieties. The lowest population of t. tabaci was recorded on variety Phulkara and highest population recorded on Thano Bulla Khan. The minimum population of T. tabaci (23.67+4.23 thrips/plants) was recorded on Phulkara and the maximum population of T. tabaci (53.49+4.09 thrips/plants) was recorded on Thano Bulla Khan variety. Whereas other varieties Ghotki and NasarPuri the maximum population (35.08+4.51 thrips/plants) and (48.91+4.92 thrips/plants) was recorded. Overall population of thrips showed minimum (18.95+1.01thrips/plants) and maximum (40.05+1.21thrips/plants) population was recorded. The highest yield of onion was recorded (80.33+1.73 mds/acre) of variety Phulkara. whereas, the lowest yield of onion was recorded (64.67+2.00 mds/acre) of Thano Bulla Khan variety. Therefore, it is concluded that Phulkara variety considered better for sowing which resistance against thrips and high yielding variety.