Background: While the empirical data on the role of environmental factors in work addiction (WA) is steadily growing, little is known about the extent to which the workaholic environment contributes to the increased risk of WA and what are the relative contributions of direct supervisor's and colleagues' WA to one's own workaholism. Methods: The Perceived Coworkers' Work Addiction Scale (PCWAS) assessing perceived direct supervisor's and colleagues' WA, defined as an addictive disorder, was administered alongside measures of WA, job stress, and job satisfaction in a total sample of 33,222 employees from 85 cultures across six continents (63.2% females, mean age 39.35 years). Results: The PCWAS showed scalar measurement invariance between genders and job positions, and approximate measurement invariance across cultures. In most cultures, the perceived supervisor's and colleagues? WA correlated with one's own WA, job stress (positively), and job satisfaction (negatively). In structural equation models, perceived colleagues' rather than supervisor's WA was more strongly related to one's own WA and job stress in most cultures. Discussion and conclusions: These findings suggest that the PCWAS is valid and reliable for assessing the workaholic environment, and it can be used globally to provide comparable and generalizable results. The present study is the first to show that WA may considerably depend on environmental factors in different cultures worldwide and that perceived colleagues? WA may play a particularly important role in this context. These findings may guide organizational interventions to decrease WA risks among employees and improve their well-being and productivity.  Kulcsszavak: assessment, job satisfaction, job stress, organizational factors, work addiction, workaholism