Background. Continuous malaria surveillance data analysis plays a significant role in monitoring trends over time and evaluating the effectiveness of malaria prevention and control programs. Hence, this study was part of an effort to achieve this goal. This study’s main aim was to analyse five years (2016-2020) of malaria surveillance data in the Oromia Region, Ethiopia. Methods. A descriptive cross-sectional study design was used to analyse the five-year (2016-2020) trend of malaria cases in the Oromia Regional State, Ethiopia. Results. A total of 5,843,373malaria suspected cases were reported during the five-year period. Among the total reported cases, 727,738 were a total of both clinical and parasitological confirmed cases. The average total malaria annual parasite incidence (API) was 4 per 1,000 persons. The highest malaria cases were observed during the spring and summer seasons. Conclusions and Recommendation. Trends of total clinical and confirmed malaria cases decreased from year to year except for the recent year with an exceptional variability in 2019. The highest or peak of malaria cases was observed during spring season (September-November). Malaria indicator-based performance plans and achievements should be regularly and strictly reviewed and evaluated at each level.

Background:-Continues malaria surveillance data analysis plays a significant role in monitoring trends over time and evaluating the effectiveness of malaria prevention and control programs. Hence, this study was part of such an effort to achieve this goal. The main aim of this study was to analyses a five years (2016-2020) malaria surveillance data in Oromia region, Ethiopia.Methods:-a descriptive cross-sectional study design was used to analyse the five years (2016-2020) trends of malaria cases in Oromia regional state, Ethiopia.Results:-A total of 5,843,373malaria suspected cases were reported during the five-year period. Among the total reported cases 727,738 were a total of both clinical and parasitological confirmed cases. An average total malaria annual parasite incidence (API) was 4 per 1,000 person. The highest malaria cases were observed during spring and summer seasons.Conclusions and recommendation:-Trends of total clinical and confirmed malaria cases were decreased from year to year except for the recent one year with an exceptional variability in 2019.The highest or peak of malaria cases was observed during the spring season (September-November). Malaria indicator based performance plans and achievements should be regularly and strictly reviewed and evaluated at each level.