The dataset was used in the 2023 Party Politics publication "Political Communication on Facebook: Do Populist Parties Send Out More Posts?" (doi: https://doi.org/10.1177/13540688231184626). It contains the IDs from the Populism and Political Parties Expert Survey (POPPA) 2018 (doi: https://doi.org/10.7910/DVN/8NEL7B), the Facebook account names and additional information in case of dissolved parties or newly created accounts. The list was created in mid 2022.