Famine and environmental degradation in Ethiopia have been mostly caused by extreme rainfall variability. Rainwater harvesting is a technique that has been used for many years to address these problems. The best locations and rainwater harvesting methods have been determined by researchers using many different approaches. However, the performance assessment of rainwater harvesting structures has received very little attention. The purpose of this study was to evaluate the engineering performance of existing community ponds, the suitability of existing community rainwater harvesting locations and the economic viability of existing community pond water harvesting technologies. In the study area, six functional rainwater harvesting ponds were selected. To evaluate the technical performance of community pond water harvesting technologies, primary and secondary data was gathered and evaluated using descriptive statistics. This was done through direct measurements and interview with community experts. The performance of the community pond RWH system was evaluated by technical performance evaluation criteria, The result shows that the study's average runoff harvesting and system efficiency were 0.099 and 0.059, respectively, the values are very small and the ponds collect only small amount of runoff generated. Water saving efficiency with a mean value of 1.1 indicated that a given Pond's storages were insufficient to supply the expected demand within a given time. Four criteria (soil texture, soil depth, and slope) were used to evaluate suitability of existing site for community pond water harvesting technology using analytical hierarchy process. Based on the suitability criteria selected, 33 % of the sites scored 1 (very low suitability), 50 % of the sites scored 2 (low suitability), and 17% of the pond scored 3 (medium suitability). Suitability of RWH design was improved by choosing appropriate locations. An economic viability analysis of existing RWH ponds was assessed to determine their long-term viability through net present worth, cost-benefit analysis, and payback period. The result showed that 83% of the pond scored benefit-cost ratio of greater than one, net present worth value of greater than zero, and payback period of less than the service life of the ponds. Only 17% of the ponds scored a benefit-cost ratio of less than one, an net present worth value of less than zero, and a payback period of 13 years. This indicates that most of the studied area's existing ponds in the study area were economically viable. Keywords: Rainwater Harvesting, Cost-benefit, Arc-Gis, AHP, CWR