This dataset includes data from the published article " COmpliance with pandemic COmmands Scale (COCOS): The relationship between compliance with COVID-19 measures and sociodemographic and attitudinal variables", published in the journal Plos One (https://doi.org/10.1371/journal.pone.0262698). More especifically it includes data about 1410 individuals (59.2% women) who were resident in Spain. They were between 15 and 76 years old. This sample was recruited online from February to April 2021. The exclusion criteria for participating in this study were being under 15 years old, not resident in Spain, or not providing informed consent. The data includes their ages, gender, civil status, household incomes, if they have children, and responses to the COmpliance with pandemic COmmands Scale (COCOS questionnaire). It also includes data about the following issues: opinion about the usefulness of the preventive measures; feelings and opinions about the pandemic; health and vaccination; information channels, and optimism. (2025-05-22)