A Comprehensive Dataset of the Spanish Research Output and Its Associated Social Media and Altmetric Mentions (2016–2020) Arroyo Machado, Wenceslao Robinson García, Nicolás Torres Salinas, Daniel Altmetrics Publications Spain Bibliometrics Influscience The dataset is openly available in figshare at https://doi.org/10.6084/ m9.figshare.19204686. It does not include any data directly extracted from any Clarivate platform (e.g.,Web of Science) as they have only been used as intermediary sources to identify publications authored by Spanish researchers and then to recover their mentions from Altmetric.com. In this sense, the authors’ names of the publications have been normalized and clustered and a new paper subject classification has been implemented. With regard to Altmetric.com, a licensing agreement allows us to share this dataset. This work has funded by the Spanish Ministry of Science and Innovation grant numbers PID2019-109127RB-I00/SRA/10.13039/501100011033 and PID2020-117007RA-I00, and Regional Government of Andalusia Junta de Andalucia grant number A-SEJ-638-UGR20. Wenceslao ArroyoMachado has an FPU Grant (FPU18/05835) from the Spanish Ministry of Universities. Daniel Torres-Salinas is supported by the Reincorporation Programme for Young Researchers from the University of Granada. Nicolas Robinson-Garcia is funded by a Ramon y Cajal grant from the Spanish Ministry of Science and Innovation (REF: RYC2019-027886-I). Data derived from Altmetric.com were acquired through a research license and are provided under the clauses of such license. This paper presents data on research publications authored by scientists affiliated with Spanish institutions between 2016 and 2020, along with their associated social media and altmetric mentions, and on researchers affiliated with Spanish institutions whose work is highly mentioned on social media and non-academic outlets. The first dataset contains 219,988 records and 24 attributes. Each observation represents a scientific publication (article, review or letter) extracted from theWeb of Science database. For each record, we provide bibliographic metadata, its subject area and a battery of altmetric indicators extracted from Altmetric.com. The second dataset includes 4209 records and four attributes. Each record corresponds to a researcher. For each record, we include their full name, an author identifier (ORCID), their affiliation and their list of publications connecting to the first dataset. 2022-06-10T07:08:34Z 2022-06-10T07:08:34Z 2022-05-07 Arroyo-Machado,W.; Robinson-Garcia, N.; Torres-Salinas, D. A Comprehensive Dataset of the Spanish Research Output and Its Associated Social Media and Altmetric Mentions (2016–2020). Data 2022, 7, 59. [https://doi.org/10.3390/data7050059] http://hdl.handle.net/10481/75407 10.3390/data7050059 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI