Gastroenteritis caused by helminth parasites is a major hindrance for optimum productivity in small ruminants. The present study was conducted to determine the prevalence of gastrointestinal parasites (GIP) and intensity of gastrointestinal nematode (GIN) infection in Black Bengal goat of Sundarban Delta of South 24 Parganas district in West Bengal. A total of sixty goats in the age group of three months to one year were selected and coprologically screened by Standard technique for a period of one year (from Nov. 2012-Oct. 2013). The overall prevalence of GIP infection was 73.34%. Highest overall prevalence (81.67%) as well as intensity of GIN infection (606.5) was observed in monsoon and lowest prevalence (68.33%) and intensity (361.5) was recorded in summer. Haemonchus contortus was recorded as the predominant gastrointestinal parasite species with an overall prevalence of 63.25%. The results of the present study might be exploited for developing strategic control measures against naturally occurring GIP in black Bengal goat of Sundarban Delta.