Groundwater irrigation is an important factor to agricultural production in large parts of thernworld. The use of groundwater for agriculture in Ethiopia is low. Many irrigation schemesrnobtain water from river diversions in Ethiopia in which only farmers with land near the riversrngets profit from irrigation, while others are waiting for the rainy season rather than usingrngroundwater for irrigation.This research investigates the possibility of ground water asrncomplementary and/or supplemental irrigation, to increase agricultural productivity, creatingrnfood self-sufficiency, overcome the conflict between river water users and to involve farmersrnthose waiting for rain season. Utilizing groundwater resource for irrigation purpose can be arnkey alternative to improve the countryâ€™s deteriorating food supply. The main objective of thernstudy is to assess the possibility of groundwater irrigation in Ethiopia. CROPWAT 8.0 modelrnwas used to calculate reference evapotranspiration. Reference evapotranspiration and agrornecological zones were used to first classify the evapotranspiration zones of Ethiopia. Thisrnclassified evapotranspiration zones were also overlaid by the countries groundwater dischargernand access depth maps using the Arc GIS software. Finally, degree one suitable, degree twornsuitable, degree three suitable and degree four suitable groundwater irrigation was determinedrnin this research. Accordingly, the country has in general about 197,546kmrn,rn283,917kmrn2rn, 276,366kmrn2rn2 rn area degrees one, degree two, degree three and degree fourrnsuitable regions respectively, were identified and mapped. Such a map is useful for planningrngroundwater resources use for irrigation in Ethiopia. This study hopefully can be used as a basernfor further research work in the area.