Study was conducted in Addis Ababa municipal abattoir from November 2014 to March 2015 with the objectives of determining prevalence comparison of lungworm infection in sheep and cattle, identifying the species of the respiratory helminthes circulating in the area and assessing possible risk factors of lung worm infection in sheep and cattle in the study area. Post mortem examination had been done on 400 sheep and 1000cattle in Addis Ababa municipal abattoir. The overall prevalence of lung worm infection in post mortem finding was 49.5% and 1.5% in sheep and cattle, respectively. The potential risk factors to be considered were age, body condition, and species of lung worm have significant difference (p< 0.05) on prevalence of sheep and cattle's lung worm infection. Prevalence of young and adult age groups of sheep was67.33% and 43.48%,respectively as post mortem finding confirmed as well as theprevalence of young and adult age groups of cattle's were 5.19% and 0.83%, respectively according to the post mortem finding result revealed. As well as Prevalence of sheep lung worms based on their body conditions (poor, medium and good) were 63.08%, 3.76% and 47.52%, respectively and prevalence of Cattle lungworms based on their body conditions (poor, medium and good) were 0.97%, 37.98, and 0.8%, respectively.The prevalence of D. filarial (23%) was the highest and D.vivparus (1.50 %) and mixed infection (3.5%) were the lowest whereas prevalence of M. capillaries (14.75%) and P. rufescens(8.25%) were moderateas the result of post mortem finding of this study showed.Therefore, due to its great impact on production of sheep and cattle in general as a country, emphasis should be given to control and prevention of lungworm infection and further study should be conducted in future to identify the temporal pattern of this parasitic disease.