Kahrizak region is considered as one of the agricultural poles of Rey city in Iran. The purpose of the present study is to know the characteristics of the soils of the studied area, prepare maps and extract information from geostatistical methods. For this purpose, a total of 110 surface soil samples (0-30 cm) were prepared from an area of 3000 hectares and some characteristics related to soil quality were measured. To interpolate the data in the preparation of the map, geostatistical methods of Ordinary Kriging (OK), inverse distance weighted (IDW) and radial basis functions (RBF) were used. Based on the obtained results, the calcium carbonate equivalent varied from 9 to 25%. Accordingly, the pH value was changing between 7.24 and 7.89. In terms of salinity, most of the soils were less than the permissible limit, but the highest salinity was 16.68 dS/m. In terms of soil texture, the amount of silt in most soils was higher than that of clay and sand. Among the various geostatistical methods for preparing maps, in the case of organic carbon, total nitrogen, electrical conductivity, percentage of sand and clay, the OK method, in the case of carbon and nitrogen, microbial biomass and the microbial share of carbon, the IDW method and in In the case of pH value and equivalent lime, RBF method had a more accurate estimate of the mentioned characteristics in the areas without data. The highest amount of organic carbon was found in the southeastern areas of the region, and the lowest amount was observed in the northern and central areas. The pattern of spatial distribution of microbial biomass carbon and the microbial share of carbon also largely followed the pattern of organic carbon.