This article described the results of a nationwide survey on parents’ knowledge of and sources of information about childhood vaccinations in Poland. The study found that family doctors and paediatricians were the primary and most trusted sources of vaccination information for approximately 90% of parents, whereas media sources, including the internet, were used less frequently and were considered less reliable. Parents’ knowledge of mandatory vaccinations was generally limited, with only a small proportion able to name specific vaccines or vaccine‑preventable diseases. The authors emphasized the need to improve access to reliable information, particularly through physicians, who had the greatest influence on parents’ vaccination decisions.This cross‑sectional survey was funded by the European Commission’s DG SANCO through the international VACSATC project. As part of this collaboration, experts from several European countries agreed on a common methodology and a shared set of interview questions, which ensured comparability of survey results across countries. The findings of this survey supported our efforts to advocate for higher‑quality, government‑endorsed information on vaccinations for the general public and for medical practitioners and contributed to the development of the vaccination information portal Szczepienia.info.