High Quality Content by WIKIPEDIA articles! Pachpaika is a small village in the Vaishali district of Bihar, India. It is located about 12 km away from the heritage place Vaishali in Bihar. The village has a population of about 1,000. The population of Pachpaika is mainly dependent upon agriculture to survive. There is a primary school in the village and education is available up to 5th standard. Post office of this village is located at near by village Pauni Hasanpur. PIN code is 844123.