The PilotStrategy Survey Data contains survey responses from citizens regarding their perceptions of carbon capture and storage (CCS) in six relevant regions across the five PilotSTRATEGY countries (Portugal, Spain, France, Poland, and Greece). These responses were collected in two waves, in 2022 and 2025. The datasets provide the empirical basis for the published project findings on the public acceptance of CCS in the regions, as reported in the deliverables by Dütschke et al. (2022) and Dütschke et al. (2025). These datasets may be of interest to researchers and practitioners seeking to conduct further analyses beyond the original project outputs. The data comprises survey datasets (in Excel format and, where available, also in SPSS format), along with accompanying documentation, i.e. codebooks and questionnaires (in Word, Excel, and PDF formats). The aim of the regional surveys was to gain a deeper understanding of current perceptions of CCS among the general public in the relevant regions and to track changes over time. However, comparability between the two survey waves is constrained by differences in regional composition. Therefore, comparisons over time need to be interpreted with caution, as they provide limited insight into how attitudes have evolved within the specific regions under study. All surveys were implemented in the respective national languages, and the resulting datasets and documentation are provided in either the national language or English. The datasets contain survey responses from citizens residing in the regions under study in the Horizon 2020 project PilotSTRATEGY, i.e. the Lusitanian Basin in Portugal including an onshore and an offshore area next to each other, the Ebro Basin in Spain, also including an onshore and an offshore area in different parts of the Basin, Spain’s Ebro Basin, Spain’s Ebro Delta, the Paris basin in France, and Upper Silesia in Poland and West Macedonia in Greece. The second wave of surveys focused exclusively on the basins in Portugal (offshore), Spain (onshore), and France (onshore). Data was collected via telephone surveys in Portugal and Spain and online surveys in the remaining countries, with samples ranging from 243 to 497 respondents. The first wave of surveys was conducted between July and September 2022, and the second wave of surveys between June and July 2025. To ensure the representativeness of the findings, participants were recruited by subcontracted market research companies. Fraunhofer ISI administered the online surveys directly, while the market research companies conducted the telephone surveys. Data analysis was carried out by Fraunhofer ISI. Where necessary, the data were anonymised for publication to ensure data protection. This involved removing socio-demographic variables, open-ended responses, and any other variables that might allow the identification of participants, such as panel IDs. In addition, columns not required for potential analyses, such as browser data, were deleted.