ABSTRACTThe purpose of this work has been: (1) to collect data on certain lake morphometrical characteristics (area, volume and maximum depth) and geomorphological provenance from as many lakes as possible throughout Sweden, i.e., to establish a geomorphological lake register, and (2) to test a working hypothesis concerning a quantifiable relationship between lake morphometry and lake surroundings. Presently, the register includes 1060 lakes.The working hypothesis has been verified by means of a cluster analysis. The results include a new division of Sweden into five regions with lakes of similar morphometry. These results may, e.g., be used to statistically determine the most probable,‘normal’, values of lake volume, mean and maximum depth, lake form and percentage area of lake bottom dominated by processes of erosion and transportation, from knowledge of lake area alone.