Purpose: In higher education, blended learning is already strongly established. The e-courses vary in their structure, assignments, prompt examinations, interaction between students and teachers, etc. Such aspects may influence the students' perception of usefulness of blended learning. The purpose of this paper is to identify the factors which influence that feeling and to look for possible differences in perception by different subgroups of students. Design/methodology/approach: Students in the survey evaluated 13 aspects of e-courses in which they were enrolled. From enrolment documents, additional demographic data were collected (gender, high-school grade, study programme, etc.). A multiple linear regression was used with perceived usefulness as the response variable and the 12 other e-course aspects as predictors. Further, the same regression analysis was performed on different subgroups of students based on demographical data. Findings: The empirical results showed that the general impression regarding the e-courses, their consistency with the face-to-face teaching and the teachers' responsiveness had a significant influence on the students' perception of the usefulness of e-courses. Further analysis based on demographic data revealed several subgroups of students where the perception of usefulness was influenced by different aspects. The teachers' feedback and supplementing the tutorial play an important role in higher years of study, while the general impression loses its influence. Originality/value: The paper is the first to explore the importance of demographic determinants of perceived usefulness of e-learning tools in EAPAA (European Association of Public Administration Accreditation)-accredited undergraduate public administration programmes.