Perception of Urban Air Pollution Among Working Individuals During Work-Related Commute in the Klang Valley Introduction Malaysia’s rapid economic growth, urbanization and motorization cause air pollution problems in addition to intense regional transboundary air pollution. The Klang Valley is often plagued by low-visibility air pollution, which has a negative impact on the physical and mental well-being of the public. This study aims to explore the commuters’ perception of air quality during their daily commute to work. Methods A self-administered questionnaire was used to collect data on air quality perception and travel behavior among working adults (N = 197). Pearson’s Chi-Square analysis was used to analyse public perceptions on air quality with demographic data, transportation modes and health concerns. Sixty-seven percent of the respondents perceived that the air quality was unhealthy. Results There were no significant associations between air quality perception with gender, age, or health status. However, air quality perception was significantly associated with educational background (p<0.05). A very small number (9.1%) of respondents checked the air quality status daily prior to leaving their dwelling. Conclusions There was widespread awareness of the health concerns posed by air pollution when commuting to work, however, none of the respondents significantly altered their commuting route. Our findings are broadly consistent with those of others and underscore a need for improved communication to the public of risks posed by air pollution.