In physical therapy, outcome measurements (OM) are essential for measuring patient's condition over time, quantifying observations, improving communication, and optimizing patient care efficiency. This study aimed to identify the current use of outcome measurements and to investigate the facilitators and barriers for the use of OM among physiotherapists working in Sri Lanka. A cross-sectional study was conducted among physiotherapists who were recruited from government and private hospitals through a validated survey questionnaire. Descriptive statistics and binary logistic regression were performed using SPSS. The sample comprised 77 participants (males=32.5%; females=67.5%). Ninety-seven percent of the respondents used OM in their clinical practice. Outcome measurements were mainly applied to identify the baseline health status, and diagnostic purpose by 59 (26%) and 58 (25.6%) of respondents, respectively. The three most frequently reported OM were “range of motion/goniometric value” (12.8%), “manual examination of muscle strength” (12.1%) and “visual analogue scale/numeric analogue scale” (10.9%).Physiotherapists’ positive perspective towards OM was the main facilitator (95%). The other facilitators were sufficient knowledge to use OM (87%) and adequate training in the use of OM (80%). The main barrier to using OM was time constraint (58%) during the treatment. The working setting and the number of patients treated per day was independently associated with frequent use of OM (P<0.05). The relatively high use of OM, positive perspective, adequate knowledge and skills to administer OM as facilitators, as well as time constraint as a perceived barrier to use OM, were all significant findings in this study.