A cross sectional study was conducted from November, 2017 to June, 2018 in and around Jimma to determine the prevalence of ovine lungworm infection, and to identify predominant lungworm species involved in the area. In this study feacal samples were taken from 293 sheep of all age groups, from both extensive and semi-intensive management systems, body condition score and both sexes were examined using modified Baerman technique to see the prevalence of lung worm by extracting L1 larvae from the processed feacal sample. The present study indicated that 67 sheep (22.9% of the total 293 examined sheep) were found infected with different types of lung worm species. The infection rate between male and female animals showed nonsignificant difference (p> 0.05) with prevalence of 23.4% in females and 22.3% in males. The prevalence of lung worm in different age groups (23%, 27% and 29.9% in animals with < 6 months of age, 6-24 months of age and in animals with >24 months of age respectively), age group showed no significance difference. There was a significant difference (P< 0.004) in the prevalence of lungworm infection with respect to management 14.8% in semi-intensive and 29.1% in extensive management systems were found respectively. In the case of body condition prevalence rates of (13.6% in good, 22.7% in medium and 29.9% in poor body conditioned animals) were found with p=0.023 with statistically significant association (P< 0.05). D.filaria was found the dominant lung worm species in the study area with 40 (59.7%) of the total infection followed by M.capillaris (25.4%). Mixed infection of these two species was found the least prevalent case in the study area involved only in 14.9% of the total prevalence rate. The result of this study indicated that lungworm infection in sheep is common parasite which induces heavy economic loss that needs greater attention due to its impact on sheep production of the study area. Therefore an appropriate control and prevention intervention should be carried out in order to reduce the losses associated with the parasite.