We analyse labour demand and mismatch for educational traits in information and communication technology (ICT) occupations, taking into account the areas of education, occupations and skills in demand, and the supply of labour. We based our analysis on almost 40 million online job offers and a CAWI survey of people aged 18-65 in Poland. The analysis uses official classifications, and considers both job-related and transversal skills. To analyse an objective measure of mismatch, we compare job requirements stated in job offers to the declared characteristics of potential labour supply, and present demand and mismatch for skills across occupations. We also model a declared educational mismatch and its determinants, including educational profiles of surveyed participants. In order to further investigate the mismatches in ICT fields of education, occupations and skills, we compare them with the mismatches in other occupational groups. The analysis concludes with direct educational policy recommendations, including the Sectoral Qualifications Framework for ICT occupations in Poland. Our approach shows the complete educational characteristics of skill demands and skill mismatches.