This paper presents the results of original user-based research regarding the Basque diaspora presence on social network sites (SNSs). It is the first academic investigation on the users of Basque diaspora-association groups on Facebook, the largest SNS on the Web. It focuses on the online and offline dimensions of the Basque institutional diaspora presence on the World Wide Web. By concentrating on the Basque diaspora case, I draw attention to the implications that information and communication technologies (ICTs) have on international migrant diasporas, with particular emphasis on how migrant associations and their members perform in a bid to accomplish their activities and goals. The present work opens new venues for future multi- and interdisciplinary analysis as well as comparative and longitudinal studies that could clearly be of interest to researchers, scholars and students of migration and ICTs.