Mercury resistant bacteria isolated from gold mining soil in Kabupaten Sijunjung, West Sumatera, Indonesia. Our prior study found 5 bacteria isolates with highest resistant capability. The present study is to evaluate all five isolates abilities in Nutrient Broth medium with three variant additional of mercury (HgCl2): 150 ppm, 200 ppm, and 250 ppm. The result shows all five isolates grow well in the media indicated by the increase of optical density value observed once in three days for twelve days. The highest OD value achieved by MRB 5, which is 1.2. Mercury reduce analyzed on day 12. Mercury reduce (HgCl2) by all five isolate reach the highest value, within range 70.69- 85.44%, with highest mercury reduce percentage achieved by isolate MRB5 and the lowest one by isolate MRB2. This research may become the basic concern in bioremediation of mercury contaminated environment, particularly in West Sumatera, Indonesia.