Galicia is a region of 29, 574 km2 located in Northwest Spain with a population of 2.8 million people. We analyzed the weekly incidence of reported cases of influenza in Galicia between 2001 and 2011 for each of the 53 Galician counties: Raten,s=log(casesn,s×100000/popn,s) for county s and week n. The population (pop) was obtained from the Statistical Institute of Galicia (IGE, http://www.ige.eu) and the number of influenza cases (cases) from the Health Service of Galicia (www.sergas.es).