This paper investigates differences in the levels of work engagement across demographic and work- and organization-related factors, and their relative importance for work engagement. The study used a sample of 17,498 male and 17,897 female employees from the sixth European Working Conditions Survey (2015). Several significant differences were observed between the levels of work engagement in different demographic and work- and organization related groups. Employees working in human service occupations reported higher levels of work engagement than employees in other industries. Relatively, occupational group (68%) and industry (17%) contributed most to work engagement. It is concluded that it is important to focus on enhancing work engagement, particularly among less educated employees, among those with nonpermanent contracts, and in certain occupations (download full article).