Introduction: Critical thinking is an important element in nursing practice as well as being a vital educational outcome in any nursing curriculum. Critical thinking can influence the outcome of patient care and patient satisfaction. Objective: To determine the level of critical thinking ability among nursing students in two nursing colleges and its differences according to social demographic variables. Method: This was a cross sectional descriptive study design in which Critical Ability Scale for College Students were used to collect data from 158 nursing students in two private nursing colleges in Malaysia. Participants were recruited through convenience sampling. Results: The mean overall score for critical thinking ability was 70.6±6.98 with scores ranging from 56 to 89. The mean score of the subscales was 3.63±0.50 for intellectual, eagerness and health skepticism abilities, 3.63±0.42 for intellectual honesty ability, 3.61± 0.41 for prudence ability and 2.68±0.64 for objectivity ability. There are no significant differences between the independent variables and level of critical thinking ability. Conclusion: A high critical thinking ability score was reported with intellectual, eagerness and health skepticism being the highest subscale. The way forward requires academicians and clinicians to work together to ensure a transfer of knowledge and skills from the classroom to the clinical environment in order to develop and enhance the ability to think critically in making clinical decision and produce thinking nurses for the future.