ABSTRACT: The paper describes the state of art and the results achieved in hydrogeologic research and prospection activities in Slovakia during the period 1991 - 1995. The research has been oriented mainly at the compilation of hydrogeologic map s at a scale 1:50000 (Fig. 2). Some hydrogeologic research has been done in selected regions and limited activities to solve methodological and theoretical problems, related to the hydrogeological practice, have also been carried out.