This paper examines the contribution of the founder of modern Ukrainian geography, Stepan Rudnyts'kyi, to Ukrainian nation-building. It demonstrates how Rudnyts'kyi put Ukraine on the mental map of the Ukrainian public before the declaration of Ukraine's independence in 1918. This is done by analyzing his key publications and showing how he formed a vision of Ukraine and delineated its territory to influence the perceptions of the Ukrainian public on the eve of the struggle for Ukraine's independence. Rudnyts'kyi's contribution is also viewed within the context of competition from rival modern nation-building projects in Eastern Europe, most notably Polish and Russian. The developments are also examined within Miroslav Hroch's periodization of national movements. Rudnyts'kyi played an important role in stage B (patriotic agitation) in Ukrainian national revival.