Kolasi is a village situated near Katihar Town (5.0 km) of Bihar state in India.

It is located on the banks of the Kosi river, surrounded by temples and agriculture lands and gathering a harmonized society above cast and religion.

[1] It is the main center of local self-business in nearby villages (such as Durgasthan, Dighri, Simria, Sivadih, Sandalpur, Sonapur, Hazipur, etc.)

The people from different region flocking to this semi-town local market for Sweet Shops, Cloths, Shoes, Vegetables, and various other items.

The people here speak Hindi, Urdu, Angika, Maithili, Bhojpuri, Bengali, Marwari, Surjapuri, etc.

There is large scale migration of poor people to the various cities of India in search of jobs.

Kolasi is on NH 81 and is the junction point for paths leading to Korha, Katihar Town, Purnea, Simariya, Baijnathpur, Sandalpur, Shivadih, Semapur etc.

Bus service is also good to Purnea, Semapur, Manihari, Bhagalpur, Patna, Ranchi, etc.

The teledensity is high, which reflects the economic development in the recent times of the rural area.