The original ICT skill test data including Finnish basic (grades 7-9/9, aged 12-16) and secondary education (aged 15-22) students' background knowledge and usage habit survey results and digital skills test results. Data has been collected in Finland within years 2014 and 2015 from 41 secondary (grades 7–9/9) and upper secondary level schools (study years 1–3/3). Altogether, 3,159 students were tested; 52% were male students, and 48% were female students. The age of the students ranged from 12 through 22 and their mean age was 15.9. Further, 40% (N = 1,261) came from the basic education (lower secondary level), and 60% (N = 1,898) came from secondary education (upper secondary level). Of those upper secondary level students who participated in this study, 54% came from general upper secondary schools, while 46% came from vocational upper secondary schools.