Abstract: Based on the evaluation data of agricultural geological surveys in Minhou County, Fujian Province, this study investigated the distribution of selenium contents in the surface soil of the cultivated land and garden plots in Minhou County and its major controlling factors. Moreover, it analyzed the selenium contents in agricultural products. The results are as follows. The selenium content in the surface soil is controlled by the geological setting. The areas with Late Jurassic concealed granite porphyries occurring have significantly higher soil selenium content than other areas. Moreover, different landforms, soil types, and land uses have certain effects on selenium content in the soil. Most of the agricultural products in the study area have low selenium content. The main selenium-rich crop is rice, which has a selenium accumulation rate of 78.6% according to the preliminary evaluation. However, some rice samples had excessive As or Cd content. Therefore, attention should be paid to the risk of excessive heavy metals in the development and utilization of selenium-rich rice. Based on the distribution of clean selenium-rich soil and the selenium-rich characteristics of agricultural products, this study determined nine potential areas of natural selenium-rich land in the study area.