In order to investigate the concentrations of selenium (Se) in plants of the Dashan Region, a typical Se-rich area of China, and to illuminate the daily dietary Se intake of residents in this region, 83 crop samples and 144 Chinese herb samples were collected. Total Se was analyzed in the edible portion of crops and the medical portion of Chinese herbs. The average concentrations of Se ranged from 100 to 3,100 μg kg^-1 (dry weight/DW) in different crops and from 20 to 1,500 μg kg^-1 in the Chinese herbs (DW). The crop that contained the highest concentrations of Se was radish, while maize contained the lowest levels. For the Chinese herbs, the highest concentrations of Se were found in Rumex japonicas, while Cape jasmine contained the lowest levels of Se. The average enrichment coefficients (ECs) were 6.1-300% in crops, and 1.6-117% in Chinese herbs. Among the crops, radish had the highest EC (300%), while pumpkin had the lowest (6.1%). Among the Chinese herbs, Sapium sebiferum had the highest EC (117%), while Dicranopteris dichotoma had the lowest (1.6%). Based on the composition of residents’ daily diets, the estimated daily Se intake from crops was 282±20 μg day^-1, and was about 5 times higher than the RDA value suggested by WHO (55 μg day^-1). Although no selenosis incidents have occurred in the Dashan Region to date, the potential health risk caused by chronic exposure to high levels of Se cannot be ignored.