Sustainability issues in higher educational institutions have attracted increasing levels of attention from both the public and policy-makers in recent decades. Many studies have called for a more integration of sustainability into mainstream university operations and curricula. Nevertheless, the interest in sustainability issues has been more recent in the specific case of Spain. On this basis, the aim of this paper is to examine the main factors (size of universities, chairs related to sustainability, political orientation and sustainability disclosure) that might explain the presence of sustainability initiatives in Spanish universities. To accomplish this task, data were collected using a systematic content analysis of the published strategic plans of Spanish universities during the last decade. Two main findings were identified: first, the four variables chosen were not related to the presence or absence of sustainability initiatives in the strategic plans of Spanish universities, excepting the partial influence exerted by the size and political orientation. Second, there was a scarce presence of sustainability initiatives in the strategic plans of Spanish universities analysed.