This research is to study the application of geographic information system in analyzing the risk areas drought in Nong Khai province covers an area of 1 891,,583 farm by the geographical information system in analysis. To study the drought in the area by using factor 5 factor is the quantity of rain fell on the area. The characteristics soil texture, drainage of the soil.The overlay data analysis is the area of Nong Khai, the risk area drought high thinking is 200 square kilometers. Percent 6.29 of all areas with moderate risk area, drought, think area, 1 351 square kilometers. 42.48 percent of the total area. Have the risk area drought low level, think area, 1099 square kilometers. 34.56 percent of the total area. There is no risk of drought area, is 530 square kilometers. 16.67 percent of the total area.
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