The epidemiological study of gastrointestinal parasites was carried out in unorganized sheepfarms in aeolian plains of Haryana from March, 2018 to February, 2019. A total of 1080 faecal samples were examined, out of which 899 (83.24%) were positive for helminthic infections. The different helmiinths observed were strongyles (80.93%), Strongyloides spp. (28.24%), Trichuris spp. (7.31%) and Moniezia spp. (1.02%). Infection was non-significantly higher in adults (83.34%) as compared to young (76.67%). Males showed a non-significantly higher infection (89.79%) as compared to females (82.59%). Significantly higher (p<0.05) infection was observed in monsoon (98.88%) as compared to winter (74.17%), spring (78.88%) and summer (82.72%) season. Significantly higher (p<0.05) infection (100%) was observed during month of August and September while lowest infection was observed during month of November (56.67%). Coproculture studies revealed that Haemonchus contortus was predominant parasite during all the seasons, followed by Strongyloides spp., Trichostrongylus spp. and Oesophagostomum spp. No trematode eggs were identified during study period