A new dataset of radiocaron dates (NeoNetAtl) providing new curated radiocarbon dates for the study of the pioneer farming front (i.e. Neolithisation, ca. 7000 to 3500 cal BC) in the Southern European Atlantic Coast river basin (Portugal, Western Spain, Southwestern France) has been published. The complete dataset is formed by a data frame with tab-separated values, and a connex dataframe: thesaurus.tsv. The dataset contains 1,141 radiocarbon dates from 253 archaeological sites and 815 different archaeological contexts (stratigraphic units, structures, negative features, hearths, etc.). Dataset is available in open-acess at the UNIPI’s MOD repository: https://digitallib.unipi.it/it/raccolta/The-NeoNetAtl-dataset/