{{As of|2001}} India [[census]],<ref>{{cite web|url=http://www.censusindia.net/results/town.php?stad=A&state5=999|archiveurl=httphttps://web.archive.org/web/20040616075334/http://www.censusindia.net/results/town.php?stad=A&state5=999|archivedate=2004-06-16|title= Census of India 2001: Data from the 2001 Census, including cities, villages and towns (Provisional)|accessdate=2008-11-01|work= |publisher= Census Commission of India}}</ref> Belagachhia had a population of 4610. Males constitute 51% of the population and females 49%. Belagachhia has an average literacy rate of 74%, higher than the national average of 59.5%; with 56% of the males and 44% of females literate. 11% of the population is under 6 years of age.
