Abstract <p>Information on the production characteristics of aquatic vegetation species in the lakes of the Belarusian Lakeland is summarized. Data are provided on the values of phytomass, air-dry weight, productivity, and number of specimens depending on the classes of projective cover for 43 different macrophytes. The values of phytomass and air-dry weight parameters obtained for the Belarusian Lakeland are within the ranges of values given for other natural territories of the Republic of Belarus. The values of phytomass of macrophytes of the Belarusian Lakeland are also compared with data for other regions, and the closest similarity of the indicators of the surveyed territory with data for the Komi Republic, Upper Volga region, northwestern Russia, and the Republic of Buryatia is established. The indicators of phytomass, projective cover, and number of plants per square meter of 16 species in different types of lakes are analyzed, and significant differences are received for <i>Phragmites australis</i>, <i>Nuphar lutea</i>, <i>Potamogeton lucens</i>, <i>Persicaria amphibia</i>, <i>Equisetum fluviatile</i>, and <i>Schoenoplectus lacustris</i>. For 20 out of 28 species, reliable significant or high values of correlation and regression coefficients are established for the interconnection of phytomass indicators with the parameters of projective cover and/or abundance per square meter.</p>