Kosi Kalan is a city& municipality of Mathura district in the Indian state of Uttar Pradesh. It is about 45 km from Mathura city and 100 km from New Delhi located in 27°47′N 77°26′E NH02 Delhi-Agra highway well connected with Mathura, Agra and Delhi with train and road. Khurd and Kalan Persian language word which means small and big respectively when two villages have same name then it is distinguished as Kalan means big and Khurd means small.