Proteus mirabilis is a commonly isolated pathogen from patients suffering from complicated urinary tract infections. The study was conducted over a period of one and half year (January 2013 to June 2014). Clean catch midstream urine specimens or catheterized urine samples were collected in sterile containers and were processed by standard Microbiological techniques. Antimicrobial susceptibility testing was done according to CLSI guidelines. MIC was calculated by BD Phoenix automated system. The overall prevalence of P. mirabilis was 2.8% among culture positive urine samples. Antibiotic susceptibility profile of P. mirabilis showed that piperacillin/tazobactam, meropenem, cefotaxime, amikacin, aztreonam and ciprofloxacin were the most active antibiotics as 87% to 98% of the strains were susceptible while ampicillin, cefuroxime, ofloxacin and chloramphenicol were least effective as none to only 13% of the strains were susceptible. According to the pattern of antibiotic susceptibility in a health care institution, clinical microbiology laboratories should decide that among group A and B, which agents should be reported routinely and which agents should be reported selectively in consultation with infection control committee of the health care institution. Selective reporting minimise the selection of multidrug resistant strains by overuse of broad spectrum agents.